Lena's best friend, Allison, is in a panic. On a walk in the woods by her home, she discovers the body of her mail carrier, an argumentative man who recently had a falling out with Allison's husband. Lena quickly realises that Allison has nothing to worry about as the murder weapon points to a different suspect altogether: Lena's embattled boyfriend, Sam. Now Lena and her boss (and idol!), mystery writer Camilla Graham, must work together to find the real killer - before it's too late for Sam.