No witnesses. No motive. No name.

The homeless man's death seems an impossible case to solve. But Deputy District Attorney Rachel Knight isn't going to let that prevent her trying to bring his killer to justice.

When she uncovers a link between this death and the vicious murder of an LAPD cop, one thing becomes clear: she's looking for someone who will kill to keep their secrets safe.

Someone who is as smart and determined as Rachel herself.

Someone who is already watching, just waiting for the chance to strike...