Bullied by his peers and ignored by his parents, a lonesome grade school boy befriends the sickly new girl next door. You know, the one who only leaves the house after dark, climbs through third-floor windows without a ladder and appears just as the town is stunned by a string of violent murders? That girl. She's into some ghastly stuff, obviously, but the glimmer of friendship these kids nurture is sweet and pure, a complete antithesis to all the dark acts that, by necessity, she gets up to when they're apart. Two lost souls who finally find comfort in the vast, dark expanse.

There's a lot left unspoken in _Let the RIght One In_; subtle hints about how these relationships have worked for her in the past, a broad sense of penitence and a reluctance to let it happen again. She knows what she is, tries to warn him away, but they both feel the connection and he's persistent about getting closer. Being around her gives him the strength to take command of his own life and make meaningful changes. There's inherent conflict here - she's good for him AND bad for him - that causes a melancholic sense of imminence to loom like a specter over both lives. By the story's end, one conflict is resolved (a more up-front plot involving those school bullies) but the greater issue is left open-ended. Does the cycle continue? Is the circle bound to remain unbroken? It's left to the viewer to draw their own conclusions.