Phil and Sara Whyman take their team to investigate the multi-layered history and hauntings of an art deco dance hall that's hiding a network of eerie tunnels below. Smethwick Baths is a sprawling venue where apparitions, noises and an unsavoury entity have been reported. Joined by their team mates Jane Carrigan and Dale Dickinson, Sara has an experience she won't forget, while Dale gets a rather painful headache, and the entire team is mystified by a particular incident that keeps occurring.