一天，609号房东花花公子Mum，看到一个小伙在他的床上，从他们第一次碰头就上床那天后，神秘的工作不竭产生。Mum总是梦见一个神秘的事务，三更总会被奇异的梦俄然惊醒。Mum试图经过过程和女人上床来忘记和年轻男人的“感情”。但是，这乃至让他多想想他的梦中恋人。然后，他把事务的点点滴滴联系起来，提出了反向平行宇宙的理论。最后，他在实际生活中碰到了Dew。固然他们的第一次碰头是Dew的最后一天，但也是他们两个彼此帮忙改变将来的开端！ One day, a strange man is sleeping on Mum's bed, a playboy and the owner of room 609. They both have passionate sex the first time they meet and after that, mysterious things keep happing. Mum always dreams of a mysterious event and wake up frightened in the middle of the night. Mum tries to forget the "feeling" with the young man by having sex with women. However, it even makes him think of the man of his dream more. Then, he connects the dots of the events and comes up with the theory of reverse parallel universe. Finally, he meets Dew in real life. Though their first meeting is Dew's last day, but also the beginning that both of them will help each other to change the future如如影视