After his father leaves on a trip to secure a new birth certificate for him, eleven-year-old Maximiliano Córdoba meets a refugee named Isadora from the war-torn country of Abismo and learns that the stories his grandfather has been telling him are true: his family are part of a secret society of guardians who lead refugees to safety through an abandoned stone tower named La Reina Gigante. Abandoning his dreams of becoming a soccer star, Max sets out on a journey to help Isadora reach safety and hopefully learn the truth behind the disappearance of his mother.