Lu Mannhu once experienced an unforgettable first love. Though they couldn't be together and her former partner has since found happiness elsewhere, she remains fixated on the past for years, unwilling to open her heart again. Her sole focus is on accumulating wealth and becoming a powerful, rich woman. One day, her bored best friends made a bet: the loser would have to become a "sugar mommy" to a young, handsome man. Despite her many talents, Lu Mannhu found herself outmaneuvered by her three friends during a mahjong game, losing the bet and having to fulfill the promise. She kept losing, game after game. Her losing streak eventually led her to a "husband" who is cold-faced, ill-tempered, and constantly threatens to switch partners and cancel their contract after just a few words.