British paratroopers launch one of the most audacious plans of the Second World War - Operation Market Garden. Private Duncan Shaw records his experiences as his unit fights desperately to capture a vital bridge from the Germans. Duncan's great granddaughter Zoe retraces his steps as part of a college project to accompany veterans of the battle and record their experiences. What Zoe doesn't anticipate is uncovering a series of disturbing family secrets, some with deadly consequences. A body is found tangled in the rushes on the banks of the Rhine, close to the river boat where former police officer, Steph Grant, and her partner, Chief Inspector Philip Hale, are chaperoning students from the college where she now works. Working with Dutch police, the pair investigate further, and quickly discover that no one is safe - be they pupils, veterans or staff.