Elena and Ian are visiting they're Grandpa for a month but they don't know their grandpa has something to hide. Something dangerous. Something secretly located. Something never ending. Something with monsters and creatures in it. Elena finds it.

The Metropolis was the last place standing, and the only safe place left on Earth. Outside the Walls of the city, without the extent of technology, was certain death. Until death found its way inside. When a government-funded, defensive virus known as Morbidus is stolen and released into the outer-city of the Metropolis, sixteen year old Tess Franklin loses her mother. As the Virus makes its way through the street rats and out of the MetWall into the Rebel camps, the mysterious Ellie loses her father, and is left all alone. Plagued with thoughts of revenge, the girls frin themselves desperately trying to unravel the mystery of who stole and released the Virus. But when the girls get thrown together, and get tangled in a web of lies,is this mystery worth enough for them to risk their lives?