When East End baker Alan Konrad dies, it looks like an accident at first. Konrad had a successful business, a happy marriage, and a prosperous family. But as McCallum gets closer to the truth, he opens a Pandora's box of lies and deceit.

A Brazilian prostitute dies from what turns out to be a "superbug" bacterial infection, setting McCallum on the trail of an illegal-immigrant scam. Can McCallum track down the source of the lethal bacteria before it spreads through London?