Buffy and Angel must pool their resources and fight side by side to prevent the loss of scores of innocent lives - even if the lives at stake are not exactly human.

When Angel came to Los Angeles, it was the fast-talking, half-demon Irish-American Doyle who first explained to him the mission for which he was destined: the saving of lost souls. All the more ironic, then, that Doyle was the one Angel couldn't save. Reconcilled at last to the heritage he had long denied, Doyle sacrificed his life to save a shipload of helpless, peaceable demons from a Nazi-style extermination crew.

But Doyle's legacy lies not only in the gift of visions he bequethed to Cordelia with their one and only kiss. Unaware of their danger, Angel and co. are unprepared for the visitor at their door. Intending to free him from what he sees as the human taint that always held him back, Doyle's demon father, Axtius, is none too pleased to find that his wayward son is dead.

Meanwhile in Sunnydale, someone apart from the Slayer is slaying. The victims, strangely, all appear to be human-demon half-breeds. The trail leads Buffy to Los Angeles, where before long she and Angel find themselves in the front line to stop an avenging fury from wholesale slaughter...