The Cold Case: M.A.R.K

There was a mysterious person behind M.A.R.K, from Lezville Bay, Ariomore. M.A.R.K forced four girls to investigate the long-lost case of Robin Presley Matthew. The girls have no clue about who this M.A.R.K was. They were dictated to follow a certain path through some cryptic messages that can only be read by themselves via a wrist GPS tracker bracelet. They all are innocent but were bound to follow the orders of that mysterious person. They later realized that the M.A.R.K was the name of their father. Their father did something in the past which needs to be found by their daughters.