Sleep (2023)

A newly married couple's flat becomes a place where one partner cannot safely stop watching the other. Jung Yu-mi and Lee Sun-kyun make sleepwalking unsettling through the difference between what the wife witnesses and what her husband can remember. A baby raises the stakes without enlarging the setting. Sleep is especially good if you want domestic rhythms to become strange by degrees, with dark humour and competing explanations that make certainty difficult. Avoid learning how it resolves before watching.