Seokga the No-Longer-Fallen is looking for his love. Since he lost Hani and was reinstated as a god, nothing has felt right - and he's been desperately searching for her reincarnated form ever since.

But when the red thread of fate leads Seokga to a cruise down the river of the dead, the woman he finds isn't Hani . . . she's Yoo Kisa, and she has no memory of him whatsoever - with seemingly no interest in regaining it either.

But when the Heavenly Emperor of Okhwang is murdered, Seokga and Kisa must solve the crime before the cruise ends. And as the mystery draws them closer, they will have to decide what they truly mean to each other.

There's something bigger at play aboard the ship, something that holds the key to their fated connection - and the very fate of the world.