Cass and Tor work for the Broken Heart service company. The Duo are infamous for collecting debt in their own messy and unique way. When Mom (Mistress of Medicine) sends them on a new mission, Tor and Cass encounter a new enemy. The duo's peaceful life is filled with chaos as they try to complete their tasks and fight the unwanted opponent. The more Cass and Tor solve the mystery, the more they get entangled in lies and secrets.