Drea and Eleanor agree to go after one another's bullies.

Having harnessed her ever-growing power after lifting the dreadful curse of the eternal winter in La reine des neiges (2013), the beautiful conjurer of snow and ice, Queen Elsa, now rules the peaceful kingdom of Arendelle, enjoying a happy life with her sister, Princess Anna. However, a melodious voice that only Elsa can hear keeps her awake, inviting her to the mystical enchanted forest that the sisters' father told them a long time ago. Now, unable to block the thrilling call of the secret...

Having survived the farcical but utterly life-threatening events in Happy Birthdead (2017), the feisty sorority sister, Tree Gelbman, finds herself in the same college dorm, thankful to be alive. However, this time, it's Carter's roommate, Ryan, who claims that he is reliving the same paradoxical day over and over again, as a mysterious paranoid killer in a single-toothed baby-faced mask with a big kitchen knife has made a habit of murdering him. Under those circumstances, a valiant but vain...

A teenage girl, trying to enjoy her birthday, soon realizes that this is her final one. That is, if she can figure out who her killer is. She must relive that day, over and over again, dying in a different way each time. Can she solve her own murder?