Gu Mang is determined to turn over a new leaf and prove to Mo Xi that he's not the ruthless man he once was. Yet as his old memories return, the shadow of the traitorous General Gu seems to haunt him, raising questions to which he has no answers-both about his defection from Chonghua and his past entanglements with Mo Xi.

As Mo Xi and Gu Mang struggle toward a fragile truce, the pair are summoned for an emergency rescue mission to an island inhabited by demons. But this island is full of buried secrets…including one that may unravel everything Mo Xi and Gu Mang thought they knew about the past.