Subterranean trolls raise an orphaned boy, who helps them fight back against an evil exterminator and make peace with the fearful residents of an upper-crust Victorian-era town known for its world-class cheeses. The two things the people of this posh town treasure most are their children and their cheeses; unfortunately, those are also the things that the Boxtrolls - a race of unsightly, sewer-dwelling creatures - covet most. Clad in cast-off cardboard boxes as they scuttle about underground, the Boxtrolls may look like a fearsome bunch, they're actually quite friendly.