THE ATTACKS WON'T STOP. NEITHER WILL SHE. LONDON 2027. Terrorists deploy London Black, a highly sophisticated nerve gas, at Waterloo Station. For the 'Vulnerables', exposure means near-certain death. A lucky few survive, aided by Boost injections. LONDON 2029. Copy-cat attacks plague the city. DI Lucy Stone, a guilt-ridden Vulnerable, is called to investigate a gruesome murder of a scientist, who might have held the key to an antidote. But is the antidote real? And can Lucy solve the case before her Boosts stop working, leaving her defenceless once again? The clock is ticking - and London Black is in the air. . .