Gomez (Raul Julia) and Morticia (Anjelica Huston) have had a new arrival, a baby they name Pubert. Uncle Fester (Christopher Lloyd) meanwhile meets and marries Debbie Jellinsky (Jane Cusack) who plans to inherit the Addams family fortune by killing Fester. Fester mistakenly believes these attempts are signs of affection and due to his relative immortality he survives these attempts. Debbie persuades Fester to move into a new home together after her attempts fail. Due to the absence of Fester, Pubert develops a disease in which he becomes a normal baby. Finally, out of frustration, Jellinsky confronts Fester with a gun and confesses to wanting him dead for the family estate. Fester escapes but is chased to the Addams family mansion where Debbie manages to strap the entire family to chairs she has rigged up with electricity. Pubert is the only one not tied up. Due to the return of his Uncle he regains his Addams abilities and escapes from his nursery. He manages to switch the wires so that when Jellinsky pulls the switch, she is electrocuted and killed instead of the family.