Stephen Ezard returns home from China for his brother's funeral and finds himself drawn into an intrigue when he tries to determine the circumstances of his death.

Noted microbiologists are dying at an alarming rate as Stephen tries to learn the cause of death of the beautiful woman found in his apartment. Yasim suspects that her late husband, Michael, stumbled on the secret before being blown up by a landmine in Afghanistan.

Using a government database, Stephen and Yasim try to find out what killed Nadir; Stephen almost believes he sees Michael.

Stephen and Yasim continue searching for the truth about the tainted vaccine; Stephen becomes homeless.

Sent to retrieve blood samples from refugees dying from the contaminated vaccine, Stephen has a startling revelation that sends him racing to expose the truth before all evidence is destroyed.