To save their orphanage, sisters Nora and Vivian Collins sign a contract to become the Johnson family's "professional daughters-in-law." Tough, martial arts expert Nora is assigned to tame the playboy heir, Colton. Meanwhile, Vivian is ordered to heal the reclusive, Graham. It's a business deal: fix the brothers, get the cash. But when their mission is nearly complete and the sisters prepare to leave, Colton and Graham realize that they've fallen for their wives.