When an ancestral relic is discovered by Gomez and Morticia, they realize that something strange is happening in the mansion. As they investigate, they discover that the relic holds a dark secret capable of awakening an ancient evil that threatens the entire family.
While Gomez organizes a gathering with their eccentric relatives, including Uncle Fester, Cousin Itt, and Grandma Addams, Morticia begins to research more about the curse connected to the relic. With the help of Wednesday and Pugsley, she unravels riddles and hidden secrets in the mansion, facing dangers and supernatural beings along the way.
Meanwhile, each member of the Addams Family must deal with their own personal dilemmas. Wednesday falls in love with a deemed "normal" guy, questioning her gothic identity and causing family tensions. Pugsley struggles to master his magical powers, causing chaos and confusion in the mansion.
With the assistance of their eccentric relatives, the Addams Family must join forces to protect the mansion, unravel the mysteries of the relic, and confront the ancient evil on the verge of being unleashed. Throughout this journey, they discover the true value of their unity, love, and acceptance in the pursuit of solving the mysteries of the manor.
