When a dead rat makes an unwelcome appearance on Hiverna restaurant's menu on their most important evening, head chef Len Tekler is beyond furious - someone is trying to stop him winning Arden Restaurant of the Year and he wants to know who. He calls in in Frank and Lu, but they're unable to crack the case before the saboteur strikes again - causing a nasty bout of food poisoning leading to Hiverna's closure. An apoplectic Len swears bloody revenge but is found dead the next day from suspected poisoning. As the pair learn from acerbic blogger Paulina, there are many people with good reason to wish despotic Len ill - from his downtrodden son, Milo, to bitter ex-business partner, Trevor, it seems everyone has a story to tell, but who would want to silence him forever?
