19-year-old Lola, to avenge her humiliated and deranged older sister, infiltrates the Russell family, a Brooklyn mafia family, as a nanny under a false name, only to be seen through by the heir Dylan who also develops feelings for her. Amidst mutual suspicion and tension, the two team up to uncover the conspiracy of the family's mole and rival gangs. After bloody vengeance against their enemies and as they are about to marry, they discover that their biological father who abandoned the sisters has become their new foe, and the two step into a life-or-death showdown side by side once again.
