The president of a famous motorcycle company is killed along with his wife, and the alleged killer appears to be his brother, Sophy’s uncle. Being forced to give up her rights, Sophy, the sole heiress, runs away from home, seeking justice. Being followed by her uncle’s subordinates, her path intertwines with Bo’s, which she asks for help when she sees her martial arts skills. Being in a bad financial situation and more than that, suffering from memory loss, Bo refuses any involvement. But when the subordinate boss kills the cook who replaced Bo’s parents, he decides to take revenge, thereby helping Sophy. Together with Bo’s two best friends, they form a team in a short time, while Agent A and Agent B investigate the same case.