A recycling plant in Yorkshire makes a gruesome discovery when an intact human foot is found among the waste.

Detectives and forensic teams rush to the scene and work at the plant grinds to a halt. Experts are called in including a Forensic Anthropologist to find answers to three key questions in the investigation – to whom does the foot belong, is this a case of murder, and could there be more than one body hidden at the plant?

At the scene they are faced with an enormous task, with thousands of tonnes of waste to comb through. With no idea whether they are searching for one person or even a serial killer, what unfolds is a complex DNA mystery that takes the forensic team across the globe.