The communicating doors of the title are in the 6th floor Penthouse suite of the Regal Hotel in London. They, to the guest's surprise, allow some of them to travel through time, returning to the same hotel room. But not everybody gets transported to the same era!
Julian has procured a prostitute for Reece. The girl, Phoebe, is a dominatrix who goes by the name Poopay Daysir. As it turns out, Reece doesn't want her for what she usually gets paid for, but instead wants her to witness a confession and then deliver it to trusted hands. Reece has been very successful in life, along with his business partner Julian, but it has come at a high cost. Two of Reece's wives were killed by Julian along the way. Julian gets wise to the fact that there is a confession revealing his crimes and that Poopay knows about them and, naturally, he plans to get rid of her as well. She escapes, sort of, through the infamous communicating doors. Can she convince Reece's wives that they are in danger? Or will Julian find her first?