In 2012, "Rongcheng", a coastal city in southeastern China. On the eve of the explosion of the mobile Internet, smartphones began to become popular, Weibo emerged, and WeChat had just been launched.
Two souls with future memories and hatred, trapped in 18-year-old bodies, were forced to become roommates. They were wary of each other, tested each other, and acted out each other, but through "breakthroughs" they revealed the truth that had been hidden in their previous lives. From "I'm going to kill you" to "We seem to have been fooled" to "How about we do the most important things together in this life".
