An undercover operative takes on a fake marriage mission to infiltrate a criminal syndicate and seize crucial transaction records. During the dangerous scheme, unexpected sincere affection develops between the two sides. Long-hidden lies surface, exposing a decades-long fabricated blood feud manipulated by an unseen mastermind to profit from inter-clan conflict. The two sides abandon hatred, ally with former rivals, dismantle the villain’s network, clear all injustice, and abandon old identities to stay together with complete honesty.