A down-on-his-luck ex-detective, a jittery professor suspected of murder, and a mystery they can't solve without each other. If Norman Melamourne, a Source-hating ex-detective, had things his way, the Source wouldn't have snapped into existence twenty years ago. After all, it's the reason his wife lost her life; he lost his job, and now even his favorite restaurants use Source-processed ingredients. He can taste the difference, and it's awful.

When a consulting position lands on his plate, it leaves a bad taste, too. The Source was the apparent method of murder. As much as Norman despises the Source, the one hard and fast rule was it couldn't affect living things. But it seems it had, and to make matters worse, the prime suspect, Lance Delum, is the son of the man Norman blames for his wife's death.

Lance Delum, Professor of Source Studies, can't get the image of his student's, Sasha's, magically burned-out eyes from his head. It was an impossible thing, the Source affecting living material, but it had happened, and Lance, for all his knowledge of the damned field, couldn't figure out how. Or why.

Torn between grief and frustration at his lack of understanding, Lance soon finds himself in a desperate attempt to clear his name. Another body was found days after Lance's release, and more circumstantial evidence points to him. As he investigates, Norman’s heart says Lance did it. An expert in the field might be able to pull this off, and the kid came from a bad crop as far as Norman was concerned. But his gut says Lance is being set up, and Norman always trusts his gut.

Getting Lance to trust Norman might be about as difficult as clearing the kid’s name, but the two must work together to prove Lance’s innocence and discover why someone is killing with the Source.