Judo expert Han Lu is still figuring out her personal identity. Her mother raised her as a boy, treating her as a substitute for her dead brother. As a result, Han Lu is unsure about who she is supposed to be. She finds herself drawn to Ni Ke, a bratty and vain internet celebrity. When the two meet at a judo competition, their physical contest quickly heats up into something more. Ni Ke is then cast in an action movie, and Han Lu becomes her stunt double. As they work together, the young women develop feelings for each other they never thought possible, and aren’t quite sure how to label their relationship. As they struggle with trying to figure out who they are, Han Lu and Ni Ke realize there is no substitute for love.