Four years have passed since the last horrific encounter with the masked killer Michael Myers in Haddonfield. The town is still reeling from the trauma, with survivors coping in various ways. Laurie Strode, having outlived her daughter, now lives with her granddaughter Allyson and is determined to let go of her fear and rage. Despite her efforts to live a normal life, Laurie continues to write her memoir, trying to make sense of the violence and loss she's endured. Myers has not been seen since that fateful night, and his absence casts a lingering shadow over the town.

On Halloween, a young boy named Corey Cunningham is babysitting in the same neighborhood where past atrocities occurred. An accidental tragedy strikes, turning Corey into a pariah in Haddonfield. The incident irreparably alters his life, subjecting him to the community's suspicion and ridicule, leaving him to wander a familiar path of despair. Meanwhile, Allyson, who has been trying to rebuild her life, crosses paths with Corey, and they find solace in each other's traumatic experiences. But as the holiday approaches, a series of violent events suggest that the nightmare might not be over, renewing old fears and pointing to the possibility that evil has returned to Haddonfield.