How do you move forward...when all you want to do is go back?

Joel and Theo haven't spoken since the summer they turned sixteen, but that's about to change.

From the outside Joel looks like the picture of success: a TV scriptwriter with a smash hit who's still together and in love with his teenage sweetheart, Amber. But he's falling apart at the seams. He's headed home to reconnect with best friend Theo--to get back to the start of it all.

Theo has been living in his parents' shed, nursing a broken heart and a wounded ego, convinced life can't get any worse. Then he gets evicted on his 30th birthday. He thinks he's done with the real world - until it shows up on his doorstep...

One of them is keeping a secret, and the other is living a lie. But can the promise they once made to walk all 184 miles of the Thames Path help them find their way back to the truth--and to their friendship?