Ruan Yu, a useless cultivator with five spiritual roots, accidentally enters the immortal sect. Her greatest talent turns out to be sleeping. While others face near-certain death when entering dreams, she forcibly marries the mysterious handsome man Mo Wen in her dreams, turning terrifying nightmare realms into a sweet everyday life. What she doesn't know is that the man she bullies at will in her dreams is astonishingly connected to Feng Suiwan, the aloof and ascetic Immortal Venerable feared by everyone in reality. A nightmare that no one has been able to overcome for three hundred years repeatedly collapses because of her, and the seven black chains binding the Immortal Venerable begin to break one after another. Only when everyone finally discovers the truth do they realize that the truly dangerous one may never have been the nightmare, but Ruan Yu herself.