The series follows the members of a Belgian secret group 'Lifeline', dedicated to enabling Allied airmen to escape to Britain, usually after they had been shot down by the Luftwaffe.
It begins in 1941 or 1942, when the Café Candide owner Albert Foiret and his mistress Monique Duchamps help Lisa Colbert (codenamed "Yvette") hide airmen and run the 'Lifeline' organisation.
Series Two was broadcast in 1978 with various changes in the cast, including the death of Lisa in the first episode and the inclusion of pianist Max Brocard (Stephen Yardley).
With financial support from London, Albert opened the larger Restaurant Candide, which was centrally located on the Grand-Place.
In 1969, Albert, Monique, Natalie and Alain contribute to a British television documentary In Our Time on the quarter-century anniversary of Brussels' liberation from the Nazis.