Save for Phantom Man, earths mightiest super team, Front Line is still missing.
But, when Delta Squad races to answer a distress call from the Front Line skyscraper headquarters, Mercy, Iota, and Chiller might find something far darker than a grieving hero.
Is Delta Squad racing to their certain doom ?
Who could be haunting the halls ?
Who let it in ?
The tower of justice becomes a tower of paralyzing fear, as a grotesque mystery awaits the rookie heroes in their most spine-chilling mission yet.