A man named Leonard "Lenny" Drake is found dead in a garbage truck and Nick and Hank investigate the case. They find blood in the dumpster near his building and a trail of blood to the parking garage. The manager explains that the tenant was a violent man that lived in his apartment with the gorgeous Natalie Havershaw. On the previous night, they had an argument and the tenants Marty Burgess first and the lawyer Mason Snyder then had come to protect her. Marty returned to his apartment while Lenny and Mason continued to argue. Then Mason escorted her to her car and she left the building to check in a hotel. Nick and Hank visit Marty at his junk shop and Nick sees that Marty looked like a mouse. Then they visit Mason and Nick sees that the lawyer looked like a snake. Nick visits Monroe and learns that the creatures are the harmless and cowardly Mauzhertz and the dangerous and lethal Lausenschlange respectively. Then Monroe receives a phone call relative to work and Nick leaves him, but Monroe receives a message instead. When another man is found dead in the dumpster of a repair shop in the same "modus-operandis" Nick believes the cases are connected.

After their face-off with Kimura, Nick finds himself trying to come to grips with the return of his mother, Kelly Burkhardt. A trail of brutal murders unveils a foreign conspiracy to hunt down Nick, leading to several revelations about his past. Meanwhile, Juliette still lies in her mysteriously-induced coma as Rosalee and Monroe work tirelessly to bring her out of it safely. Elsewhere, Hank struggles with the shocking truths he's recently seen and Captain Renard deals with unexpected family issues when his estranged brother comes back into his life.

Monroe's potion finally relieves Renard and Juliette's passionate obsession, so he and Nick can collaborate again, even closer then ever, with Monroe and Hank aboard, against the royal conspirators. Three youngster Wesen, Cole Pritchard, his girl Krystal Fletcher and his former cell-mate Gus, repeatedly commit robberies using their Wesen appearances as if masks. Monroe witnessed a bank robbery and alerts Nick's police team as well as the 'Wesen Council', as this is a blatant violation of the centuries old Schwaben code, which Amsterdam HQ chief De Groot orders enforced. Juliette has novel supernatural experiences at home.