Yi is a lonely Shanghai teenager still grieving her father's death when she discovers a young yeti hiding on the rooftop of her building, on the run from a laboratory that wants to capture him. She names him Everest and, determined to return him to his home in the Himalayas, sets off with two neighbors on an epic journey across China, pursued by an unscrupulous tycoon and a zoologist obsessed with the creature. Along the way they discover that the yeti possesses a magic capable of transforming nature. A tender and spectacular animated adventure about friendship, grief and reconnecting with one's own roots.