Evie is a 29-year-old former podcast host who wakes up after a car crash with dissociative amnesia, missing the last 13 years of her memories. Operating with the mindset of her ambitious, romance-novel-loving 16-year-old self, she is horrified to discover she is married and alienated from her loved ones. She possesses a keen interest in forensic linguistics and photography, struggling to reconcile her youthful dreams with her current reality.

Drew is a successful photojournalist who reconnects with Evie after her accident. Brooding and protective, he serves as Evie's grounding force as she copes with her amnesia. He is deeply devoted to his ailing mother and cautious about letting Evie close enough to hurt him again, guarding his own lingering heartbreak from their shared past.

Oliver is Evie's recently deceased husband, possessing intense charisma and movie-star good looks. As a teenager, he presents himself as the perfect chivalric boyfriend, fulfilling Evie's fantasies of a grand romance. His need for constant adoration and intense jealousy creates friction with those around him, pushing Evie to isolate herself from her friends and family.

Bree is Evie's fiercely loyal best friend from high school who shares her sense of feeling out of step with teenage romantic conventions. Honest and forthright, she grows up to achieve her dream of becoming a cellist in a symphony orchestra. She remains a steadfast source of support despite the distance that grows between her and Evie over the years.

Anderson is Oliver's father and an intimidating, successful anesthesiologist. He is a demanding figure who pushes his son to compete and expects absolute compliance from those around him. His cold demeanor casts a long shadow over both his family and those drawn into their orbit.

Gwendolyn is Oliver's mother and Anderson's wife. She maintains a flawless exterior and expects those in her family to uphold the same standard. She is distant toward Evie, believing that Oliver's intense adoration was the only relationship Evie needed.

Annie is Drew's warm and loving mother. A former nurse, she struggles with a chronic illness that requires ongoing care and medication. She shares a close, affectionately protective bond with her son and immediately welcomes Evie into their home, offering a stark contrast to the Roche family dynamic.

Christine is Evie's mother. She and her husband once provided a stable, unconditionally loving home in Newcastle. The mysterious years of Evie's amnesia have deeply strained their relationship, leaving Christine wary but still harboring maternal love for her daughter.

David is Evie's father. Once a steady and supportive figure in her life, the unexplained estrangement from his daughter has left him protective and initially resistant to her sudden return. He relies on Drew to manage Evie's sudden reappearance in their lives.

Chloe is a young woman connected to Oliver from his past. She is the mother of Harriet, and she reaches out to Oliver's circle when her daughter faces severe health challenges, complicating the lives of everyone involved.

Harriet is a young girl who has recently recovered from leukemia. She is sweet and resilient, drawing affection from those around her and creating an unexpected bridge between the fractured members of Evie's social circle.

Ivy is Bree's romantic partner. She is introduced to Evie through photographs, representing the steady life Bree has built during the years Evie's memories are missing.

Rose is the owner of Book Cottage who warmly greets Evie when she arrives. She provides a brief moment of familiarity and comfort, recognizing Evie and reassuring her that her parents are still alive.

Meg is a friendly acquaintance of Drew's who graduates alongside Evie. Her presence highlights the separate life Drew has built during his estrangement from Evie.