A Ken (Ekin Cheng), A Fei (Michael Wong) and A Bo (Zhang Daming) are three typical macho men. As their girlfriends, Qi Qi (Qu Ying), Lu Bi (Huang Zhuoling) and Xi Xi (Fang Zixuan) are heartbroken by their boyfriends' "flags flying outside the house". In an accident, the three men were thrown into hell. The messenger of hell (Shu Qi) took away their lifeblood and told them that they must find true love within a month and let true love say "I love you", otherwise they will be women for the rest of their lives. The three friends who lost their lifeblood were very anxious. After experiencing all kinds of inconveniences and pains of being women, their attitudes towards women gradually changed, and they also realized their mistakes and immaturity. The one-month deadline is about to come. Can A Ken, A Fei and A Bo save their girlfriends who have already been disheartened?