Following a devastating bio-weapon attack on London, two scientists are confined to a locked-down laboratory with dwindling time and air. The story unfolds with choices that determine one of eight suspenseful outcomes, shaped by the characters they encounter. Dr. Amy Tenant, an expert in Nanocell Technology who previously treated victims of a chemical attack in Kindar, is called to London when a civilian exhibiting symptoms of a similar attack appears. Reunited with a former colleague, Amy finds herself trapped within a high-security laboratory complex—a center of scientific progress concealing a dangerous secret.