Joanne Whalley (The Singing Detective, Scandal) and Ray Stevenson (Rome) star in Life Line, a supernatural and thrilling love story in two parts by Stephen Gallagher.
Successful entrepreneur Peter Briscoe leads an affluent, but soulless, life, having broken up with Katy, his one true love, 15 years earlier to pursue his career abroad.
Back in London for his brother's wedding, Peter catches a glimpse of Katy leaving an art gallery one evening and, determined to make up for lost time, decides to engineer a "chance" meeting between them.
Long since settled with a partner, played by Adrian Rawlins, and with a successful career in the art world, Katy is pleased to see Peter and agrees to meet for dinner.
Over their meal, however, Katy reveals her dissatisfaction with her relationship and that, deep down, she still feels exactly the same about Peter - and they embark upon a passionate, but ultimately doomed, love affair.
However, their love turns to tragedy and, in his torment, Peter begins to doubt his sanity as events take a series of unexpected and incredible turns. Peter discovers a card for a mysterious organisation called Life Line and, initially, he finds that his phone calls to it offer some answers. The arrival of a stranger in the shape of Catt throws Peter's life into confusion - and he realises that nothing, and no-one, are as they seem.
The second part is showing on Thursday 26th April at 9pm on BBC1.