Twelve-year-old Marius Grey has a job as a Cemetery Boy, looking after the ghosts in his family's graveyard, but he also hunts monsters and, along with his flesh-eating mermaid friend, must race against the clock to save the ghost of his dead mother. Marius Grey hunts Monsters. He's not supposed to. He's only twelve and his job as a Cemetery Boy is to look after the ghosts in his family's graveyard. He should be tending these ghosts and-of course-going...

"Julia no es la hija mexicana perfecta. Ese era el rol de su hermana Olga. Olga no fue a la universidad, se quedó en casa para cuidar a sus padres, limpiar la casa y trabajar a medio tiempo. Julia tiene grandes sueños y no quiere formar parte del camino de su hermana mayor. Pero un solo error, que ocurre mientras enviaba un mensaje de texto al mismo tiempo que cruzaba la calle más concurrida de Chicago, resulta en la muerte de Olga, dejando atrás...