All aboard me hearties for a rip-roaring tale of adventure on the high seas! There'll be rum for all and sea shanties galore as we travel back in time to join the valiant crew of the Sea Eagle, and meet a peripatetic old sea-dog known only as the Doctor.
Tracking a nexus point in time, the Doctor meets Dr Evelyn Smythe, a history lecturer whose own history seems to be rapidly vanishing. The Doctor must travel back to Tudor times to stabilise the nexus and save Evelyn's life.