Everlost is a place between life and death where some children end up after getting lost in their journey to the afterlife.

Nick and Allie, who have just awoken in a ghostly parallel to the real world, are saved by a boy named Lief, who tells them that they are called "Afterlights" who cannot be seen by the living.

He warns them of a dreaded and evil monster, the McGill, and Johnnie-O, and the altar boys before they make their way to New York City.

Allie notices other Afterlights at the Twin Towers keep repeating and doing the same thing every day, becoming stuck in ruts.

Allie is captured by the McGill, a grotesque monster who controls a ship full of Afterlights who fear him.

Since fortune cookies in Everlost always tell the truth, McGill believes he can come back to life if he collects a thousand souls.

However, unbeknownst to her Mikey was able to claw his way out of the center of the Earth through pure force of will, but over time evolved into a hideous monster, reflective of his anger.