Hazel is the 29-year-old manager of The Cinnamon Bun Book Store in Dream Harbor who feels her life has become stagnant. Approaching her thirtieth birthday, she realizes her twenties lacked the excitement and recklessness others experience. An introverted bookworm who prefers the safety of her quiet routine, she decides to step out of her comfort zone after finding mysterious clues hidden in misplaced books.

Noah is a fishing boat captain who relocated to Dream Harbor to escape the pressures of his family's seafood business. Viewed by the town as an unserious flirt, he harbors deep insecurities about his worth after dropping out of high school. He secretly spends his time restoring dilapidated fisherman's cottages on the harbor, dreaming of turning them into vacation rentals.

Annie is a Dream Harbor native and the outspoken owner of the local bakery on Main Street. She acts as a fiercely protective friend to Hazel and is always ready to involve herself in town business. Suspicious of Noah's reputation, she warns Hazel against getting emotionally attached to someone known for casual flings.

Logan is an introverted Dream Harbor native who has been close friends with Annie and Hazel for years. He prefers to avoid large social gatherings but deeply cares for his tight-knit social circle. Aware of Noah's track record with women, Logan takes it upon himself to protect Hazel from potential heartbreak.

Jeanie is the energetic owner of The Pumpkin Spice Café, located next door to the bookstore. As a relatively new addition to Dream Harbor, she quickly integrated into the community and became a core part of Hazel's support system. She frequently checks in on the local rumors and helps manage the interventions regarding Hazel's love life.

Pete is the enthusiastic Mayor of Dream Harbor and one of Hazel's fathers. He fell in love with the small town when they moved there during Hazel's teenage years and quickly became a highly involved community leader. He wants his daughter to enjoy her life and actively encourages her to have a fun summer.

Frank is Hazel's father, who moved to Dream Harbor with his partner Pete and a teenage Hazel. He shares a close, supportive bond with his daughter and forms part of the warm family foundation she relies on.

Rachel is Noah's older sister and the CEO of the Barnett family's multimillion-dollar seafood business. She attempts to maintain a connection with her brother despite the geographical and emotional distance he has placed between himself and the family.

Kristen is Noah's older sister who serves as the CFO of their parents' successful seafood supply company. Along with Rachel, she stepped into the corporate role that Noah fled.

Mr. Barnett is the patriarch of the Barnett family and founder of their seafood company. His strict expectations and harsh criticisms drove Noah to abandon the business and leave their hometown entirely.

Alex is an employee at the bookstore who helps Hazel manage the daily operations. They are occasionally questioned by Hazel regarding the mysterious highlighted books appearing on the shelves.

Mac owns the central bar in Dream Harbor where locals gather for drinks and socialization. He serves as Noah's landlord and maintains a highly antagonistic relationship with Annie, the bakery owner.