Ethan Feng, the High-Seas Gambling King, accepts a dying wish from his master, Victor Du: to protect the Du family for three years and marry his daughter, Diana. Keeping his identity hidden, Ethan endures scorn and mistreatment as a live-in son-in-law. With only three days left of his promise, Diana is set up by false friends in a tag-team con. Ethan steps in, using his cheating techniques to save the Du Casino. He then leaves, honoring the three-year promise. Realizing the truth, a frantic Diana searches for him, now understanding the depth of his sacrifice.
