May Day is approaching in the English village of Little Hodcombe, scene of an ancient Civil War battle. When the TARDIS arrives, the Doctor's companion, Tegan, is hoping to visit her grandfather. Yet the travellers learn that he has mysteriously disappeared, and the planned re-enactment of the battle has taken on a menacing tone. Local schoolteacher Jane Hampden knows how the county squire plans to celebrate May Day: with the May Queen meeting a grisly...