After pathologist Bob Ruxton is suspended from his job on the grounds of negligence, the UCOS end up being forced to reopen one of his old cases. Dr Bernard Fletcher, who worked as a senior palaeontologist at the Natural History Museum, was discovered dead following a business event in the Central Hall. His autopsy had stated that his death was the result of a fall. A new examination of the post-mortem ends up suggesting that he had sustained a single blow to his head. Madeleine Simmonds says that her former colleague Dr Fletcher was a respected but outspoken scientist and his views were often at odds with those of the museum. The investigation ends up taking an unexpected twist after the team find out that Fletcher was having an affair with a colleague and that he was also getting evidence against Mondial Fuel.