Twelve years later, Rin, now grown up, spends his days between fun and amorous encounters, hiding the loneliness he feels and his ability to see ghosts, acquired after escaping the attack of a spirit when he was a child.

Besides Do-ha, a Taoist priest, Sadam, arrives in Hanyang, chosen by the king to expel an evil spirit that haunts him, actually a result of the sovereign's madness.

For this purpose, Sadam convinces the new king to reopen a door sealed long ago to prevent resentful ghosts to enter, and the town is once again haunted.

Upon learning of Sadam's plan, Rin decides to revive the Night Watchmen, a group of soldiers that, at the time of his father, faced monsters and spirits, but were killed with the advent of the new king.

By his side are Do-ha, with whom he falls in love, Kang Moo-seok, a swordsman who initially doesn't believe in the supernatural, and Jo Sang-heon, the former captain of the Night Watchmen.