Lin Ye, an intern doctor wrongly convicted over a bizarre murder, is forced to remain under supervision at Binhai Psychiatric Hospital. While working the night shift, he accidentally discovers that the hospital's basement conceals China's seventh academy of the occult. Among its students and guardians are a night watchman bearing the bloodline of the ancient Zhulong, an icy beauty wielding a talisman sword, and a mad genius wearing electronic shackles... As a crimson moon hangs in the sky, the countdown to a thousand-year-old curse begins. Moving between reality and another world, Lin Ye gradually uncovers the shocking secret of his origins: he is the “Key to the Gate” chosen by an ancient deity.
