Edward Wales stages a seance to catch his friend's murderer. With 13 suspects, one kills again during the seance. The medium investigates when someone close is accused, aiming to expose the real culprit.

Although his murdered friend was by all accounts a scoundrel a true "bounder" Edward Wales is determined to trap his killer by staging a seance using a famous medium. Many of the 13 seance participants had a reason and a means to kill, and one of them uses the cover of darkness to kill again. When someone close to the medium is suspected she turns detective, in the hope of uncovering the true murderer.—Ron Kerrigan <[email protected]>