Martha, Helen and Geri Parker are back. With their success bringing them newfound fame, they're invited to be guests of honour at SteinerFest - a crime convention run by American celebrity P.I. couple Murray and Roberta Steiner. Like everything else in their lives, nothing goes to plan. When Murray Steiner is found dead, tongues start to wag and soon rumours spread that his death might not be simply an innocent tragedy. With Geri implicated in the potential skulduggery, it's up to Martha and Helen to clear her name and get to the bottom of what has really happened. As the list of Murray Steiner's enemies grows, including his wife, the Parker Sisters are once more thrown into the thick of the action, but can they get to the bottom of another grisly murder?