After a magical kiss at the prom, best friends Tan Lee and Winter Woo agree to cool it off, a plan that goes awry when their parents jointly head off to Hawaii and leave Tan and Winter to babysit Tan's sister Sana together. If that isn't complicated enough, Tan's ex-girlfriend from Shanghai returns with money stolen from her billionaire father and thugs on her heels. Tan soon finds himself on the run, navigating international hackers and trying to protect his friends, family, and sister—and his own heart.