In January 1967, Penny and Allen Halliwell planned to hold a "magical be-in" at the manor. They invited hundreds of their witch friends to come tap into the power of the Nexus and, as Penny put it, "ride the magic wave." A warlock named Nigel got wind of these plans, and saw an opportunity to massacre a large number of San Francisco's witches. He sent his girlfriend Robin, an evil witch, to ingratiate herself with Penny. The Magical Be-In is very much like the Human Be-In.