A 999 call comes in concerning a woman called Susan Nicholson. Her partner, Robert Trigg, says he woke to find her in a strange position and thinks she may have suffocated during the night after they fell asleep. The coroner agrees that she has suffocated, and records a verdict of accidental death. But things don't add up for Susan's family and they believe there must be more to the story. Her family discover this isn't the first time that Trigg has woken to find his partner has died after spending the night with him - history has repeated itself!

Alan Jermey calls 999 to report that his home is on fire. When his partner Kirsty is found dead, he claims someone broke in and killed her. But evidence does not mount up in his favour.