"SOCO" listens to Charlie Sagal as he talks about the relationship he had with his wife Rosalie. He looks back in 2017 where a mystery caller started bothering their marriage and details how his wife went missing on July 20 this year. Sagal then starts to establish a connection between Rosalie's mystery caller, Jan Jan, and her sudden disappearance. He heads to Rosalie's hometown in Valenzuela City and learns about Jan Jan's alleged relationship with Rosalie. Authorities start with their investigation, discover Rosalie's body in a nearby river, and identify Godofredo "Jan Jan" Perdigon Jr. as the suspect.