You Kept Your Promise

Raven had a phone that he kept in his nightstand for years that he was adamant remained charged but he would never tell the BlackbourneToma team why, only that it was from his past. One day while he's out on a mission the phone rings. Corey answers and there's a girl weakly asking for Raven. Once Raven gets back the team tells him about the call and Raven loses it. Who is the girl from the phone and will Raven reach her in time?
This is yet another CL Stone Blackbourne Toma fan fiction story.