Plymouth. A city under siege. Only no-one knows it. Alex has come to see his grandfather but instead finds himself caught in an unearthly battle with an eerie smog-bound Plymouth as Ground-Zero. From the modern-day city to secrets from the Elizabethan era Alex discovers a Plymouth he never dreamed existed. To have any hope of surviving against the monsters hiding in the smog he must put his faith in a group of strangers who seem to know far more about his grandfather than he does.