Cheng Xiaoshi lives at the Time Photo Studio with his friend Lu Guang and his childhood friend Qiao Ling is his landlady of which is mean to him in a nice way the three of them get along well but Cheng has trauma that his friends know about but he doesn’t talk about since at a young age his parents died which is why he lives with his childhood best friend he tends to ignore Lu Guang warnings about changing the past since it could be bad but he's learned not to because of things that happened..