When the DCI on the case goes into labor, Commander Clare Blake takes charge in the investigation of a dead 2-year-old girl found on the site of a now abandoned psychiatric institute. The girl has been dead for several years but the body was preserved in a tightly sealed drum and is well preserved as a result. She also has a cross branded onto her chest. The pathologist`s report is inconclusive so the team starts to check medical records of former patients. Eric Thornton and John Littlewood figure prominently in hospital files, but when it`s confirmed that Littlewood has died, the police focus all their effort on Thornton.