-Cpl. Lucy Green is killed outside of a church. A mysterious caller contacts 911.
-Jane and Lisbon track down the 911 caller. Pete Cohen is a veteran suffering from a traumatic brain injury. He has no memory of making the call or of Lucy's death.
-Cho finds out that Lucy was protecting another soldier, Rose Sutfin who filed an anonymous sexual harassment complaint. Cho pushes the Sergeant reopen the investigation after he originally closed it because Rose was too scared to talk.
-Jane helps Pete with his memories through hypnosis and accessing his memory palace.
-Jane tricks Pete into saying that Lucy gave him a key to a locker before she died. Lucy's colleague, Dr. Bowman tries to break into the locker.
-Lucy was about to start an investigation into the case of missing prescription drugs which would have led to him. He killed her to keep from getting caught.