After Carlos - a 12-year-old whose father has died in the Spanish Civil War - arrives at an ominous boys' orphanage, he discovers the school is haunted and has many dark secrets which he must uncover.
Three years ago, entomologist Dr. Susan Tyler genetically created an insect to kill cockroaches carrying a virulent disease. Now, the insects are out to destroy their only predator, mankind.
A prince of the mythical world starts a rebellion against humanity in order to rule the Earth. Hellboy and his team must fight to stop him from locating the all-powerful Golden Army.