Newgate Prison, Dublin, 1761. On a cold January morning, Darkey Kelly awaits her execution after being tried and convicted of murder. A young priest, Father Peter, visits in the hope of taking her last confession. As he offers her comfort and salvation, Darkey tries to challenge everything he believes. Is she really what she appears? Is she guilty or innocent? Murderer or victim? Father Peter longs to save her soul from eternal damnation, but Darkey Kelly is not willing to give up her secrets so easily.