One Thing I Won't Forget

A teenage girl, Chelsea Cross, and her older brother, Mitchell Cross, were told that her twin sister, Kelsey Cross, died when they got into a car crash 12 years before. One night, while Chelsea was home alone, she heard a noise come from the attic. Mitchell was at his girlfriend's house, and their parents were away on a business trip and would be for another month. She goes upstairs to discover her twin sister was up there the whole time. Chelsea found out that her sister was to stay quiet the whole time she was up there, and she eventually lost her voice from not making a sound. She wanted to confront her parents, but refused, since she didn't know what would happen to her, or her twin sister. A few months later, Chelsea had taken Kelsey out to meet her friends at her band practice. Her parents had come home early and notice that Chelsea, and Mitchell weren't home. Gary, their dad, went upstairs to the attic to make sure Kelsey was still up there. She wasn't. Gary ran down the stairs and told Marie, their mom, that Kelsey was missing. Chelsea, Kelsey, and Mitchell come home and see their parents car in the driveway. Chelsea tries to sneak Kelsey back into the attic while Mitchell distracted his parents. Only they didn't know that their parents already knew Kelsey wasn't up there. Their parents punish all three of them. Mitchell got it the worst punishment though. Kelsey's punishment was second worst, and then Chelsea's punishment. Chelsea called the police while Mitchell and her mom were outside and Kelsey and her dad were in the attic. They had locked Chelsea in her room for the time being so that Kelsey and Mitchell could receive their punishment, but they forgot to take away her cell phone. The police arrived, and Chelsea found shocking news about her parents...