A mysterious man, Dean, returns to his hometown of Grimsby after many years abroad in the Army. His arrival is met with animosity, particularly from his father, an avid pigeon racer. Dean is drawn back to confront his demons, and confess a secret to a childhood friend, Jess, only to discover she has been struggling since the untimely death of her husband. Whilst attempting to raise her child and battling a crumbling economy and dearth of opportunities, she is pulled into a harsh underworld. Dean must help her, throw her a lifeline, but the situation only darkens. When their lives are threatened he will do all it takes to make sure she is safe.
When a fracking environmental accident rips apart the earth's crust, the resulting hole lets out prehistoric sharks from underground. The sharks target a group of women and trap them in a cabin.
