The Cabot Cove residents are pulling out all the stops for their celebration of the 4th of July this year. But amidst the pleasures of planning the big event, there is tension too. Joseph Lennon, a very successful businessman, has recently relocated to Cabot Cave and is funding a big fireworks show and rock concert. There are many in town who don't like him throwing his wealth and power around to get things done his way. When Mr. Lennon's body is found the evening of the fireworks show, Jessica has a long list of potential suspects.