Summer has arrived in Maine, bringing heat, humidity, and an influx of visitors to the seaside community of Holiday Bay. Known for its enthusiasm for festivals and special events, the town thrives during the busy summer season. While the crowds are good for business, they leave employees and business owners stretched thin as they struggle to keep up with the demands of another record-breaking tourist season.

Hoping to expand her skills and bring even more value to her role at the inn, Haven enrolls in a summer cooking class taught by a popular food vlogger and culinary influencer. The instructor's unconventional approach to cooking is a hit with many of the students, including Haven. Everything seems to be going well until an outdoor cooking demonstration ends in tragedy when a gunshot rings out, leaving one person dead and a long list of suspects in its wake.

Meanwhile, Abby finds herself dealing with the consequences of a promise Colt's mother made on her behalf to the local middle school principal. Soccer season approaches, creating controversial draft-day tension between Lacy and one of her daughters. Haven makes an unexpected new friend, and Colt and Lonnie join forces with Dawson and Sully to form a classic rock band, proving that life in Holiday Bay is never dull, even when murder isn't on the agenda.

Join Abby, Haven, and the rest of the gang as they navigate friendship, family, love, second chances, and a mystery that threatens to turn a carefree summer into a season no one will soon forget.