Michael Patrick and Oisín Kearney's drama about memory and trauma. After a traumatic car crash, a woman joins a clinical drug trial that promises a cure for PTSD. The medication triggers intense flashbacks of the accident that left her fiancée comatose. But is Mary simply remembering the event, or reliving it? And if she is actually returning to the past, does that mean she can change her future? With Séainín Brennan