How are all those poor British fishermen supposed to keep the French out of their waters? By summoning an ancient merwoman, perhaps? Of course, there's the little matter of what to do with her once she's served her purpose...and what to do about this John Constantine fellow who's come sniffing around to find her himself...

Hell hath no fury like a woman scorned - especially one with gills, claws, and the teeth of a shark. Will John Constantine protect the fishermen who are in the siren's sights? Or will he lead them right to her?