Brian Forsberg does not expect justice after his niece was ambushed in the line of duty, but after three decades in law enforcement, he does expect vengeance. 

When FBI agent Cassie Campbell wakes in the hospital after being left for dead, not only has her ability to walk been taken from her but she also learns her father, uncle, and three others have died in a suspicious accident. 

Suddenly alone in the world, Cassie returns home to Minnesota, where her bachelor uncle left her his home and a new motivation: solving the mystery of his death. Tucked away in her uncle’s music collection are notes to cold cases that haunted him during his time as Hiawatha County Sheriff. If his suspicions are correct, there is a connection between Cassie’s ambush and the truth found in the cold cases.