In this serial, the Doctor (William Hartnell) and his new travelling companions Ben) (Michael Craze) and Polly (Anneke Wills) arrive on the coast of seventeenth-century Cornwall — much to the astonishment of Polly and Ben. Pirates led by Captain Samuel Pike (Michael Godfrey) and his henchman Cherub (George A. Cooper) are searching for a hidden treasure, while a smuggling ring masterminded by the local squire Edwards (Paul Whitsun-Jones) is trying to off-load contraband. Although audio recordings, still photographs, and clips of the story exist, no episodes of this serial are known to have survived.