One by one, he's killing them. Lurking in the digital underworld of Men4HookUpNow.com, he lures, seduces, charms, reaching out through instant messages to the unwary. They invite him over. He's just another trick. Harmless. They're dead wrong.

When the first bloody body surfaces, openly gay Chicago Police Department detective Ed Comparetto is called in to investigate. Sickened by the butchered mess of one of his brothers left on display in a bathtub, he seeks relief outside where the young man who discovered the body waits to tell him the story of how he found his friend. But who is this witness...and did he play a bigger part in the murder than he's letting on?

Comparetto is on a journey to discover the truth, a truth that he needs to discover before he loses his career, his boyfriend, his sanity...his life. Because in this killer's world, IM doesn't stand for instant message...it stands for instant murder.