Madeline is married to Ernest, who was once arch-rival Helen's fiance. After recovering from a mental breakdown, Helen vows to kill Madeline and steal back Ernest. Unfortunately for everyone, the introduction of a magic potion causes things to be a great deal more complicated than a mere murder plot.
Starts off in the 15th century, with Connor McLeod training with another immortal swordsman, the Japanese sorcerer Nakano. When an evil immortal named Kane kills the old wizard, the resulting battle leaves him buried in an underground cave. When Kane resurfaces in the 20th century to create havoc, it's up to McLeod to stop him.