ONE

A group of teens stumble upon a corpse lying in an abandoned car outside their house. They felt that it was better to not prod it, but the curiosity got the better of them.
They concluded that it was a murder and upon further research, began finding patterns. Their feeling proved to be correct and as it turned out, the murder wasn't a random one they'd stumbled upon. It was linked to their pasts and questioned the futures of many others.
The murderer wasn't going to stop yet. The murderer wanted revenge.