The blood-stained clothes of Simon Belgrade are found in Epping Forest, where he disappeared five years earlier whilst out for a run. Frank Miles, Simon's father-in-law and employer, has a history of violence and his daughter Becky, who was heavily pregnant with Simon's child when he disappeared, seems scared of him. She does not want to believe her husband is dead and nor do his mother Eliza and brother Tim, who portray Simon and Becky as the ideal couple. However Simon's friend Dom and his ex-wife Lois tell the team that Simon and Lois were having an affair, as were Dom and Becky. Simon also had a string of failed businesses behind him and was blackmailing Frank over tax evasion, but with no money taken from his account and no passport it seems unlikely that he skipped the country. An examination of a film showing Dom and Simon's childhood haunts in the forest leads to discovering Simon's fate whilst Dan helps Sandra cope with the anniversary of her father's death.