Tom used to live with Gaynor's sister Cheryl, but is now engaged to Gaynor. Tom gave Gaynor a watch - one of those running ones that tracks your location. Tom stole a bank card out of Gaynor's purse.
After Tom killed Cheryl, Ffion was out jogging and saw a ponytail sticking out of the soil. Tom thwacked Ffion on the back of the head and Ffion was in a coma for weeks.
Tom has been poisoning Ffion. Ffion started to remember about the ponytail, but Tom persuaded her she was imagining it.
Ffion has fallen in love with Tom not realising he has tried to kill her and has been poisoning him.
Gaynor doesn't believe that Cheryl was her sister because Tom gave her some hair to do a DNA test. The test proved that there was no match, but the hair wasn't Cheryl's.
Cheryl is presumed missing and last used her (or was it her sister's card) in Stoke. Cheryl is now pushing up the bedding plants in Gaynor's garden.
Tom persuaded Gaynor to have a glass of wine before she went out. He kept topping up her glass surreptitiously. She got in her car, he phoned the cops, she lost her licence.
Cassie hates Tom. Maya thinks Tom is controlling Gaynor, but she has gone to be with her Nan who is very ill.
Gaynor has opened a shared bank account with Tom, and is busy planning their wedding.
That's just one of the storylines.