A teenager is found murdered on a construction site. Grissom, Sarah, and Warrick follow the lead of blood on a hammer. Nick, with an assist from Catherine, tries to find…

A teenager is found murdered on a construction site. Grissom, Sarah, and Warrick follow the lead of blood on a hammer. Nick, with an assist from Catherine, tries to find…

When Harmony wakes up next to a dead man with vampire bites in his neck, she’s afraid she lost her head and killed him… but she can’t remember doing it.