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Still waging an internal battle between his good and evil sides, Cole (Julian McMahon) becomes convinced that a malevolent outside force is rechannelling him into committing murder. That "force" turns out to be Barbas (Billy Drago), the Demon of Fear, and an old nemesis of the Charmed Ones. Although Phoebe (Holly Marie Combs) and Piper (Alyssa Milano) steer clear of Cole's plight for fear of further strengthening Barbas, Paige (Rose McGowan) has no qualms about trying to vanquish the Demon of Fear, who in retaliation launches a campaign of psychological terror that turns the girls against one another in an extremely violent fashion.