Every Fourth of July, the town of Cabot Cove hosts an elaborate celebration - and no one is more enthusiastic than the town's newest resident, corporate mogul Joseph Lennon. He's desperate to give the town an unwanted 21st century makeover, including financing a fireworks extravaganza to rival New York City's. But when Lennon's lifeless body is found floating in the water outside his office, Jessica Fletcher has no choice but to investigate her fellow Cabot Cove citizens to find out if one of them is capable of murder...