The Childish Thing (2017)

Jack has lived in the same house his entire life. It's where he worked his crayons into colorful stumps. It's where he got into baseball. It's where he got out of baseball. And it's where he lost his big brother. But now he's moving out. When his mom leaves him alone for a weekend, Jack does everything on her to-do list except sort through the endless piles of boxes hiding behind every door. Until he trips over a memory long-buried and unleashes the boogeyman he'd almost forgotten about. Jack's only chance at ending his oldest nightmare lies somewhere between his best friends, a survival guide scribbled by his five-year-old self and the pain he thought he'd already packed away.