Simple

Cassie is in love.  And she's in trouble.  She's a paralegal in the Connolly law firm.  Mike Connolly is running for governor, he's married, and his handlers don't like the fact that he's been messing around with Cassie.  When Cassie ends up murdered, her handyman Cal is the instant suspect.  This is one of Commander Christie's and Colleen Greer's most exciting cases.   And as one reviewer pointed out, the food is excellent, too.  Sweet potato ravioli with butter-sage dressing on a stake-out!