A Black teen in dystopian Boston works sealing cracks which open underneath the city, threatening to swallow it whole. During one shift, he sees through a black-hole-type crack to an alternate reality in which his queer desire is fully realized.

During the height of World War II bombings in London, a group of British school boys are sent across the Atlantic to a Canadian boarding school. When one of the boys goes missing from the ship, the school attempts to uncover what really happened during the voyage overseas.