The key opens the mirror world, where ordinary objects in reality transform into vicious monsters in the mirror world. Once the alien beasts are allowed to break through the barrier, both worlds will collapse.
An ordinary girl, Mo Yunbai, accidentally gets the key to an alarm clock, breaks into a dangerous alien world, and meets the mysterious Ji Xianming.
The two team up to break through levels, solve strange stories, and kill monsters. They are each other's only support. But Mo Yunbai gradually realized that everything from the moment they met was a premeditation.
Intention: Love cannot reverse the established destiny, and reincarnation does not mean perfection. Rather than obsessively looking back on the past and trying to keep the dead, accepting the loss and making peace with regrets is the real salvation.