Yinchen and Yinxi are a pair of very close sisters. Yinxi is the boss of SHERO, an all-female bodyguard company she set up after their parents were murdered 7 years ago. While protecting a famous Korean soccer player Kim, Yinxi and team faces off with a mafia gang in their riskiest assignment to date...

Yinxi escorts socialite Gina to Australia for an auction, Yinchen tags along. Gina sells her necklace at a high price to Mr and Mrs Yue Feihong. Right before the assignment ends, Yinxi gets into a conflict with Gina. The two sisters plan to meet after the mission, but Yinxi fails to show up; unbeknownst to Yinchen, Yinxi is being pursued by a mysterious killer...

Unable to find Yinxi, Yinchen makes a police report. Ruixiang notices that someone is tailing him and injures himself accidentally. At the hospital, Ruixiang runs into Yinchen, who is still trying to look for Yinxi. Ruixiang offers to help put up a search notice. Police investigations show that Yinxi is likely dead, leaving Yin Xi devastated...

A devastated Yinchen returns to Singapore, Junsheng consoles her. With Yinxi gone, Yinchen considers closing down SHERO, leaving the team heavy-hearted. Junsheng is the finance manager at RSB and also Ruixiang's good friend, but he has yet another identity. After watching Yinxi's interview about SHERO, Yinchen decides to take over the company to continue her sister's legacy...

Yinchen starts undergoing various training to become an excellent bodyguard like Yinxi. As part of her training, Yinchen is assigned to a new case together with Jingyu. Dai Guowei hires Xinya and Meizhen, but his inappropriate behavior triggers painful memories for Xinya. Ruixiang is attacked by an assassin, and Junsheng intervenes just in time to save him...

Ruixiang is hospitalized. Junsheng suspects the assassination is related to RSB's illegal doings. Yinchen officially completes and passes the bodyguard training. Ruixiang requests for Yinchen to be his bodyguard; Yinchen takes up this job with Jingyu. Yinchen confesses her feelings to Junsheng, only to realize that he sees her as a friend. The person that he likes is actually Yinxi...

Yinchen senses that Yinxi is still alive somewhere! Ruixiang suggests finding the mastermind before going to Australia to find Yinxi. Ah-biao is about to kill Dai Guowei when Meizhen and Zihan intervened. The assassin strikes again, and Ruixiang displays impressive combat skills, leaving Yinchen curious about his true intentions of seeking protection from her...

Code discovers a confidential folder named RC in Yinxi's laptop; Yinchen suspects it is related to the mysterious man R. Xinya recalls that Ruixiang has met Yinxi in Australia. Code unlocks the RC folder and uncovers criminal evidence of Guowei Medical Group. Ah-biao kills Dai Guowei, but sets up his death as a suicide. Using a test email, Yinchen confirms that Ruixiang is indeed R...

Yinchen confronts Ruixiang; he finally admits to working with Yinxi on a project named Robinhood'. He suspects that someone in SHERO had betrayed them, causing him and Yinxi to be hunted down. Yinxi is in a hospital in Australia, but her memories are fragmented. Targets of the Robinhood project had their secrets exposed on the dark web; Yinchen wonders if it was Ruixiang's doings...

A hidden camera is found in Yinxi's office, confirming the presence of a mole, but everyone denies involvement. Junsheng suspects Ruixiang and Ah-biao is involved in Dai Guowei's death, but police could not find incriminating evidence. Meihua bears a grudge against Gina over a necklace. Xinya takes urgent leave and excuses herself from work, hence becoming the biggest suspect for the mole...

Yinchen and Ruixiang catch Xinya stealing money. Xinya denies betraying Yinxi, but refuses to explain herself for the theft. Yinchen announces to the team that Xinya is the mole, but they still need to find concrete evidence before handing her to the police. Ruixiang finds a bugging device below his desk, and begins to grow suspicion towards Junsheng...

The key evidence finally surfaces, allowing Yinchen and Ruixiang to identify the mole. However, it is still unknown who wanted Yinxi dead. Yinxi manages to recall Yinchen's phone number and tries to contact her. On the 30th anniversary celebration of RSB, Junsheng secretly monitors the interaction between the Yue family and Thomas, while Ruixiang confesses his feelings for Yinchen...

At the banquet, a guest suddenly attacks Feihong and injures him. Meihua captures the attacker and reveals that he was hired by Gina to target her. Feihong confronts Meihua and she admits to engaging in illegal transactions with Gina. Ruixiang secretly listens in on Jun Sheng and finds out that the man who was after Yin Xi is a professional assassin named Mercy...

Meihua orders Ah Biao to eliminate Gina. The police inform Yinchen of Yinxi's whereabouts. The SHERO team is delighted, and Yinchen makes plans to go to Australia immediately. Mercy finds Yinxi before Yinchen does, and attempts to kill her, but Yinchen and the others arrive just in time to stop him. As they question Mercy about the mastermind, Mercy gets shot by a sniper...

A photo of Ruixiang is found in Mercy's phone; Junsheng suspects Ruixiang is somewhat related to the mastermind. Yinchen realizes Junsheng has feelings for Yinxi and encourages him to woo her. Yinxi could not recall who could have wanted her dead. Gina hires SHERO's protection to go to her flour factory in Malaysia; there, the bodyguards discover her true identity...

Gina is killed by a masked man. Yinxi remembers Mercy saying that the mastermind is someone from RSB, and thinks that it is Ruixiang, putting Yinchen in a spot. Ruixiang suspects that his family is involved in illegal dealings, but his parents deny it. Code confesses to Xinya again but is rejected, Jingyu comforts him. Looking through the RC folder, Yinxi recalls more crucial moments...

Yinchen breaks up with Ruixiang. Yalian tells Yinchen about the death of Ruixiang's ex-fiancee Xiaomin, hoping Yinchen could give him another chance. When Yinxi is assaulted and the sisters are in danger, Ruixiang saves them, gaining back Yinchen's trust. Yinxi finally remembers Junsheng and how she feels towards him. Yinchen accompanies Ruixiang on his work trip, where he planned a surprise...

Yinxi remembers that she was investigating their parents' death before she was attacked. Feihong realizes that Yinchen and Yinxi are the daughters of Zhang Tianyou; Meihua admits that she wants Yinxi dead. The police investigate RSB for illegal activities. In order to protect his wife and son, Feihong decides to surrender himself to the police...

Ruixiang discovers that Thomas was the one who assaulted Xiaomin and wants to seek revenge for her. Yinchen arrives in time to stop him. Meihua mentions that it was her plan to separate Ruixiang and Xiaomin, Yalian overhears this and collapses from shock. Yinchen suspects that there is something wrong with Ruixiang. She tries to investigate, and the results confirms her suspicions...

Meihua tricks Yinchen and Yinxi to go to Australia with her, where she has arranged for hitmen to kill the sisters. Fortunately team SHERO is already prepared for the situation. Junsheng discovers Meihua's base for her dark web operations and rushes over to Australia with Ruixiang, just in time to see Yinchen and Yinxi confronting Meihua. Just then, a gunshot is heard...