After teaming up with her boyfriend Camden Turner to open a coffee shop with an amazing bakery, Joanna Coffee gets a job catering an engagement party at the local bed and breakfast that will surely be a big success—until there are several fatalities.

An entire table of guests is poisoned, and the victims all have one thing in common. They drank the frappes served by Cup of Jo. Once again a suspect in a murder investigation, Jo has to find the real killer before her ex and current police detective, Quentin Perry, charges her for the crime.