In this narrative based on the Salem witch trials, the Doctor and his companions, Susan, Ian, and Barbara, struggle to navigate the mass hysteria and legal dangers of 1692 Massachusetts. Susan inadvertently fuels local suspicions through her friendship with Mary Warren and a series of telepathic or psychosomatic "fits" that the Puritans interpret as witchcraft. While Ian and Barbara face imprisonment and interrogation, the Doctor attempts to balance his desire to help the condemned Rebecca Nurse with the rigid laws of time that forbid altering history. Despite their efforts to introduce logic and reason to the community, the travelers find themselves trapped by the same prejudices and religious fervor that led to the historical tragedies. Ultimately, the story explores the heavy emotional toll of witnessing past injustices that cannot be undone, highlighting the human cost of fear and intolerance. The characters eventually escape back to the TARDIS, leaving behind a community still grappling with its delusions and the legacy of the hunt.