In the summer, Prudence Halliwell, on the instructions of a wealthy customer, went to buy medieval books in England. Phoebe and Piper tagged along with her. In the town of High-on-Wye, located in the heart of King Arthur's former domain, Piper learned how to cast love spells using flowers, and Phoebe met the mysterious handsome Niall. She was visited by a strange vision in which he was standing in the middle of a windswept wasteland and holding a child in his arms. Maybe Niall is a sorcerer? Then Piper saw a secret performance of a Druid ritual in which Niall occupied a central place. And the Charmed Ones decided to reveal his secret. They learned that the Druids were going to kill a local woman and only the charms of bygone times could save her. The sisters realized that they would have to take a long journey - go to Camelot!