When team investigates a mysterious alien meat supply that traces back to Rhys' haulage company, Gwen is forced to reveal the true nature of her work at Torchwood to a stunned and suspicious Rhys.

Captain Jack calls in Martha Jones, now working for UNIT, to assist the team in investigating a string of mysterious deaths. However, when the trail leads to a medical testing centre, The Pharm, Martha puts her life on the line to go undercover in the increasingly sinister pharmaceutical facility.