Five months after the events of The Undetectables, business is booming - but finding cases that call for magical forensic investigators is not. So when Diana's ex, Taylor, asks them to solve a murder - her own - Diana, Mallory and Cornelia can't say no. Called to investigate the set of Undead Complex, Diana re-enters the world of TV-show prop making - even in death, the show must go on.

Even the appearance of a genuine-article Francine Leon dollhouse can't make up for the fact she's being pulled down a path of crime-solving she maybe doesn't want to walk forever. Meanwhile, Theodore's coming apart at the seams - literally - in the aftermath of their last case, and Mallory is running out of ways to help him. Especially as he seems to be keeping secrets from her.

As the clues - and the bodies - keep piling up, each one making less and less sense, The Undetectables find themselves in a new race against the clock to find out what, exactly, the killer is up to - before they strike again.