Tyrannosaur follows the story of two lonely damaged people brought together by circumstance. Joseph (Peter Mullen) is an unemployed widower, a drinker, and a man crippled by his own volatile temperament and furious anger. Hannah (Olivia Colman) is a Christian worker at a charity shop, a respectable woman who appears wholesome and happy. When the pair are brought together, Hannah appears as Joseph’s potential saviour, offering him warmth, kindness and acceptance. As their story develops Hannah’s own secrets are revealed – her relationship with husband James (Eddie Marsan) is violent and abusive – and as events spiral out of control, Joseph becomes her source of support and comfort.