A tender and funny story about wanting to go back - when you know it's time to move on.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. Theo thinks he's done with the real world - until it shows up on his doorstep...Joel is a successful TV scriptwriter, still in love with his teenage sweetheart. A proper grown-up - and yet he's falling apart at the seams. He's headed home to reconnect with best friend Theo - except they haven't spoken since the summer they turned 16.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?