All Hallows' Eve is a horror film that follows a group of teenagers who decide to spend Halloween night in an abandoned mansion rumored to be haunted. As they explore the dark and eerie rooms, they begin to experience strange and terrifying occurrences. One by one, they are picked off by a malevolent force that seems to be targeting them specifically. As the night progresses, the remaining survivors must band together to uncover the truth behind the mansion's dark past and find a way to escape before it's too late.