Meddling into the Mantletown

This story is about 4 friends that live in a town called Mantletown, the name is inspired by the word 'mantle' which means protection. the town was near a river called Crystal River . Ellie, Veronica, Mike and Neil studied in Mantletown high. The town was in peace until Ellie and Neil's parents goes missing. The town was very much disturbed. slowly many people in the town start getting murdered or goes missing. The 4 friends dedicate their 2 high school years to solve this mystery. weird messages keeping revolving around the town and the only one responsible for this was the serial killer who had a big Motive.