When 12-year-old Chinese exchange student Xi Zhou's April Fools' prank goes disastrously wrong, it drags his host family, their son Lucas, and his crush Charlotte (Charly) into a tumultuous adventure full of gangsters, cash and chaos. With the mafia, a crew of rapper-thugs, and a bumbling police duo in pursuit, Lucas and Xi must team up to fix the mess they’ve created. Their only hope? Pulling off one final, genius prank.