'Who am I? Why am I here? Why did my mother give me away?'

On the surface, Luke and his girlfriend Hannah seem to have a perfect life. He's an A&R man, she's an arts correspondent and they are devoted to their new-born son Samuel.

But beneath the gloss Luke has always felt like an outsider. So when he finds his birth mother Alice, the instant connection with her is a little like falling in love.

When Hannah goes back to work, Luke asks Alice to look after their son. But Alice - fuelled with grief from when her baby was taken from her 27 years ago - starts to fall in love with Samuel. And Luke won't settle for his mother pushing him aside once again...

'You're stuck there, aren't you? Right at the end. And I wonder if it might help to go back to the beginning, to put everything in some kind of order.'

Catherine has witnessed something so traumatic that she can't speak. Or won't speak.The doctors say the only way forward is to look into her past.

Catherine needs to start with HIM.

Fifteen years ago she met Lucian at university and fell into a passionate love affair. They were meant to be together forever. But something happened. Something that destroyed them.

Catherine married someone else. Had two children. She moved on - or so she thought. Now Lucian is back, showing her how different life could have been.

But going back to the beginning won't change the ending.

In fact, it might be the thing that finally breaks her...