This Side Mission involves a few things. First, you must answer a ringing phone to start it and get Ring Ring. You are then given 12 phone locations. Phones ring randomly, but never ring again after they are picked up. When you pick one up you must race to phone icon highlighted on your map. Doing so will allow you to hear part of the killer’s story, but at the same time you must move to follow the dotted circle to trace it. It takes at least 8 calls to find out and enter his hideout. After finding the location, go and take him down. This requires the Freeze Mine Upgrade or Line Launcher to complete.