Scott Adkins and Dolph Lundgren star in this action thriller directed by Eric Styles. When a mysterious river monster in China attacks and kills several people, scientist Travis Preston (Adkins) travels out to investigate. When he arrives in the small fishing village he discovers, to his dismay, notorious hunter Harker (Lundgren) is also searching for the creature but with very different methods. If Travis can find the monster first he intends to capture it and study its existence; if Harker finds it he intends to kill it. Who will get there first?

British filmmaker Joanna Hogg writes and directs this drama set in the Scilly Isles, painting a portrait of a middle class English family under strain. When Edward (Tom Hiddleston) announces his plans to go on a volunteer trip to Africa, his mother Patricia (Kate Fahy) decides to gather her family together for a farewell holiday in the Scillies. But as they go through the motions of the carefree family holiday and anticipate the imminent arrival of Edward's father, old fractures begin to surface.