In a city hit by a deadly Virus, the North Edinburgh Health Enforcement Team have their work cut out to find missing people.  While Bernard investigates the disappearance of a nurse who has undertaken a home visit that could prove fatal, Mona is in pursuit of an arts dealer in trouble. Unfortunately, so are his many creditors.  Bernard and Mona must find the missing, while obeying the first rule in the HET handbook - don't end up dead.