The Hughes family have just started to get their lives back together in the wake of the devastating rape and murder of their youngest daughter, Catrin (Manon Prysor). But the nightmares are reawakened when the killer is released from prison only three years into his sentence. Incensed by this travesty of justice, Catrin’s brother, Alun (Dafydd Emyr), vows to reap his own retribution – much to the horror of his elder sister, Rhiannon (Nia Medi). In a desperate bid to put a stop to Alun’s plan she finds herself alone in a remote ruined mansion in the dead of night, face to face with her sister’s killer.