Childhood friends Tommy and Tuppence meet in London after having served in World War I. Recently demobed, short of money, and with no job prospects, they decide to become adventurers for hire. Soon, they are employed by the British Government to locate a secret treaty signed before the war.
Elliot is staying with her ex’s new girlfriend while attending a medical trial for her recent, unexplained loss of hearing. As she reconfigures her relationship with her (sonic) environment and herself, an intimate connection sparks between the two women.
