Dambusters tells the story of one of the most daring and iconic bombing raids of WWII through the eyes of the descendants of the key historical figures who played a part in this remarkable event. Erica Whittaker-Wallis, 17, is the great-granddaughter of Barnes Wallis, the bouncing bomb's inventor. Chloe Straver, 20, is the great-great-niece of Guy Gibson, the experienced young officer who led the raid. Felix Clarke, 20, is the great-grandson of Edward Cuthbert Johnson, the bomb aimer whose expertise enabled his bouncing bomb to breach the Eder Dam. All three discover the role their ancestors played and celebrate the bravery and skill of 617 Squadron.