Duncan is seconded to the Serious Crime Group, where he is reunited with former Sun Hill colleague, DC, now acting DI Liz Rawton. But do the old friends still share the same attitudes to the job now they've moved so far apart?
Matthew and Vicky take a group of troubled kids on an outdoor pursuits weekend, but both are feeling grouchy - Vicky because of men, and Matt because of turning 40. But this could lead to surprising bonds.
PC Quinnan returns to work after time off with mental illness. He faces distrust from his colleagues, including former love interest PC Page, when on his first call he witnesses a murder but the body disappears.