©Courtesy of Magnolia Pictures and Magnet Releasing  SLEEP follows newlyweds Hyun-su (Lee Sun-kyun, PARASITE) and Soo-jin (Jung Yu-mi), whose domestic bliss is disrupted when Hyun-su begins speaking in his sleep, ominously stating, “Someone’s inside.” From that night on, whenever he falls asleep, Hyun-su transforms into someone else, with no recollection of what happened the night…