Casey is a 35-year-old widowed actress who retreats to her family's home at Lake Greene to escape media attention following a public breakdown. She spends her days drinking heavily to suppress the grief of losing her husband, Leonard, the previous summer. Isolated and lonely, she begins using binoculars to observe her glamorous neighbors, which soon pulls her into their personal lives and conflicts.

Katherine is a former supermodel married to a wealthy tech CEO. Despite her glamorous public image and immense wealth, she appears vulnerable and possibly unhappy in her marriage. After Casey saves her life, the two form a quick bond, though Katherine remains guarded about her private domestic matters.

Thomas is the ambitious CEO of a social media company called Mixer. He recently moved into a modern, glass-walled house across the lake with his wife, Katherine. He exhibits controlling behavior and clear frustration with his wife, sparking Casey's initial suspicions about his character.

Boone is a former police officer who now works as a handyman around Lake Greene. As a widower who is actively involved in Alcoholics Anonymous, he understands the pain of loss and the struggle with addiction. He provides a sober, grounded presence near Casey's chaotic daily routine.

Wilma is a local police detective and a personal friend of Boone Conrad. She investigates missing persons cases in the area and handles neighborhood disputes. She operates with a practical, no-nonsense attitude and prefers residents to let the law handle suspicious activities rather than investigating on their own.

Leonard, frequently called Len, was a screenwriter and Casey's husband of five years. He drowned in Lake Greene the previous summer under circumstances that completely upended Casey's life. His death triggered Casey's downward spiral, and the memory of their final days together constantly haunts her.

Lolly is Casey's mother and a captivating Broadway star. Coming from humble origins, she built a highly successful career and holds high expectations for her daughter. She constantly pressures Casey to sober up and return to acting.

Marnie is Casey's cousin and one of her few remaining connections to the outside world. She acts as a voice of reason, running errands for Casey in the city and frequently advising her to mind her own business rather than spying on the neighbors.

Eli is Casey's neighbor and longtime friend on the lake. He frequently shares local superstitions and historical lore about Lake Greene. He enables Casey's drinking habits by fetching liquor for her so she does not have to face the public.

Megan is one of three young women who have recently gone missing in the area. Her disappearance contributes to the growing tension around the lake and prompts an ongoing police investigation led by Wilma Anson.

Toni is a young woman who vanished from the surrounding lake communities. Her case is part of the broader investigation being conducted by local law enforcement to find a suspected serial killer.

Sue Ellen is the third of the missing women from the lakes surrounding the community. Her disappearance haunts the locals and adds to the grim atmosphere of the summer season.