The whole world knows how hard Hong Kong people work. Sometimes one person even works two jobs just for the sake of a "family"! Deng Zai, who has no father or mother, has no lofty goals. He just wants to have fun in the moment, live slowly and casually, so he becomes a slasher, doing everything from delivery boy to car delivery. Once, he met the "Black Widow" Sister Huo, a well-known strong woman in the city, and was invited to join a program called "Million Cohabitation" and move into her mansion with several other participants selected by Sister Huo. Start living together for half a year. During the cohabitation period, all the rules set by Sister Huo must be followed, and in return, as long as the cohabitation period is safely completed for half a year, everyone can receive a bonus of one million! At the beginning, a few people thought that for one million, they could live together happily. Unexpectedly, it was difficult to meet each other and live together. The longer they lived together, the more problems they had!