Shed of the Dead (2019) on Netflix

Plot summary

Trevor has no job, and he spends his days away from his wife in his allotment shed, painting figurines and war-gaming with Graham, a friend who does not leave the house. In his own mind he is Casimir the Destroyer, a battle mage. Mr Parsons, another allotment tenant, petitions to have Trevor removed from his plot. The argument that follows leaves Trevor with a corpse he has to hide, and it happens just as the dead begin to rise. Trevor's trouble grows, and he must decide whether to try to save his wife and her best friend, a woman both he and Graham have their eye on, or to leave her to an uncertain fate.