If you could travel back in time to revisit a moment from your childhood, which moment would you choose - and what price would you be willing to pay? Stephen, a brilliant young scientist, lives in Cambridge, England in what appears to be the 1920s - but nothing is quite as it seems. A tragic event leads Stephen to become obsessed with revisiting his past -- no matter what the cost. Aided by a beautiful university student and an ambitious partner, love, jealousy and desire cloud his judgement - sending him spiraling towards madness.