Shelter

Former government assassin Michael Mason, an ex-operative of the Black Kites, an elite government kill team, lives on an island off the coast of Scotland with his dog. Each week, Mason receives supplies from Jessie, a young girl grieving the loss of her mother who grows increasingly frustrated by his lack of respect and reclusiveness. Sometime prior, Mason went rogue from his former agency and has been on the run ever since.

After delivering Mason's latest supplies, Jessie and her uncle get caught in a storm. Her uncle drowns, and Jessie injures her ankle. Mason comes to her aid and shelters her in his cabin on the island until she recovers. Realising that her injury has to be treated with proper medication, he sets off on his boat to the nearby town. His appearance in the town is caught by a phone camera that is connected to MI6, who are running a covert operation to apprehend terrorists and rogue agents. Thus, Mason draws the attention of his former agency, who dispatch a squad of soldiers to the island to kill him. He eliminates the team before fleeing the island with Jessie in tow. Mason's former handler, Manafort, who is aiming to tie up the loose ends of his covert missions, orders a hit on Mason.

Seeking to protect Jessie, they hide out at a farm and plan to steal a car to escape. The two bond after he teaches her how to handle a gun for protection. The police and Workman, a mercenary controlled by Manafort, locate the farm, where Mason engages them with Jessie’s assistance. After Mason and Jessie escape, Workman pursues Mason in a car chase.

After running Workman off the road, the pair reaches the house of Mason's friend, Arthur Booth. Workman arrives and engages Mason in a fight before Mason, Jessie and Arthur manage to escape. Parting from Arthur, the pair travels to a London nightclub where Mason plans to use a contact to get Jessie out of the country. Workman and another team sent by Manafort storm the nightclub, but Mason kills the men and takes Jessie to the Isle of Dogs where she escapes on a boat.

Mason confronts Workman and eventually kills him by breaking his neck with a pipe attached to a chain. Mason then travels to Manafort's house and kills two of his guards. Manafort asks Mason to join him, but Mason refuses and kills him.

In Spain, Jessie, sitting in a café, receives a chess piece from Mason as a gift. Mason watches her from outside but leaves before Jessie sees him. Someone tells Jessie he was there, and she smiles.