Across an East London park, the wail of a newborn cuts through the night...

When an abandoned baby wrapped in a bloodied blanket is discovered by dog walkers, a frantic search begins to find the mother. This should be a simple case, but when it's discovered the blood isn't a genetic match to the baby, DI Erica Swift and her team are brought in. The finding raises more questions than answers.

Is the blanket a cry for help, or a clue?

The amount of blood is enough to cause Erica to fear for the safety of the mysterious victim, and when an incident in the city is linked back to the baby, the race is on to learn the truth.