A terrifying new thriller from Alex Scarrow, bestselling and award-winning author of Timeriders.

Leon and his younger sister Grace have recently moved to London from New York and are struggling to settle into their new school when news of an unidentified plague in Beijing begins to fill the news.

Within a week the virus hits London. They witness people in the streets turning to liquid before their eyes, and they run for their lives. A month after touching earth's atmosphere the virus has assimilated the world's bio-mass.

But Leon and Grace are amongst a small minority of people who are immune for a reason... a reason they need to figure out before it's too late.