Tender Mercies Psychiatric Hospital is one of the darker places in the Sunshine State. So PI Addie Gorsky isn't really surprised when young college student Elena Santos dies while under its care. When the family asks Addie to investigate, she expects to find evidence of neglect or malpractice, not murder.

But the inconsistencies surrounding Elena's death start piling up, with the tight-lipped and paranoid staff blocking Addie's investigation at every turn. After discovering that Elena was not the inexperienced college student described by her family, but a woman with a haunted past, Addie takes drastic action to unlock the deadly secrets of the Tender Mercies.

Soon Addie finds herself in a deadly chess match with an unseen opponent, a grand master of murder always one step ahead.

Can she discover the deadly secret of the Tender Mercies before another life is lost?