Modern overtime office worker You Li, staying up late to roast a beast world novel, unexpectedly transmigrated into the vicious female supporting character of the same name. As soon as she transmigrated, she ran into the mermaid male lead Luoxi Yue, whose abilities went berserk due to being tortured by the original owner. To survive, she turned over a new leaf, concealed her healing ability, and carefully placated him to seek survival and avoid danger. The mermaid who should have hated her to the bone gradually became paranoidly entangled with her.