Let Me In (2010)

In March 1983, in Los Alamos, New Mexico, a disfigured man is taken to the hospital. An unnamed police detective tries to question him about a recent murder. While the detective answers a call outside the room, the disfigured man jumps out of the window, leaving behind a note that reads: “I’M SORY ABBY”. Two weeks earlier, Owen, an unhappy and lonely 12-year-old boy who is neglected by his divorcing parents, sees a barefoot little girl named Abby and an older man moving in next door. At school, a teenage bully named Kenny and two of his friends constantly terrorize Owen, who lies to his mother about it but tells Abby the truth. Abby encourages him to retaliate, and pledges to protect him. Owen and Abby become close friends and start communicating by Morse code through the walls of their apartments. Abby’s companion Thomas abducts a local teenager and drains their blood into a jug, only to accidentally spill all of its contents.

Starving, Abby attacks a neighbor and drinks his blood, killing him and forcing Thomas to dispose of the body. On a later night, Thomas hides in the back of another car, but is discovered. In the ensuing struggle, the car falls into a ditch and flips over. Trapped, Thomas pours concentrated sulfuric acid on his face, rendering himself unrecognizable and hospitalizing himself. Abby learns what happened and visits Thomas in the hospital, who lets her drink his blood before falling to his death. That night, Owen is awakened by Abby, who insists he verbally invite her in. She spends the night in his bed and agrees to be his girlfriend. The next day, Owen’s class goes ice skating on a river. Cornered by the bullies, Owen smashes the metal pole up the side of Kenny’s head, splitting his left ear. At the same moment, the students discover the neighbor’s body encased in the ice.