Serena Webster joined the BAU three years after her child was murdered. She was determined to find out who had killed her son. What surprised her at the BAU was finding a new family, the one she had never had before. And unexpectedly, she found new love along the way. Will she be able to move on from what happened to her son, or will she continue searching for the killer? Can Spencer and Serena overcome their personal struggles to be together?