Sarah, with the help of an old friend, K-9, investigates a local witch coven over the disappearance of her aunt.

The pilot to a proposed spin-off series from Doctor Who. The Doctor leaves K9 Mark III as a gift to Sarah Jane, who is living with her Aunt Lavinia. Her aunt's ward, Brendan, is kidnapped by witches and it's up to Sarah Jane and K9 to save the day.