Seven teams up with islanders to stop the Prince of Stan from extracting an energy rock and destroying the island, but Stan's technology is too robust.

Thirteen comes to Seven's aid in a heated clash with the Prince of Stan. Seven recalls his past as a prominent figure in Xuanwu.

Thirteen's past comes to light: as the Plum Blossom Swordsman's estranged daughter, she joined the world of killers after a tragic incident.