Henry’s 40-year-old sister, a mother of three who has faced housing insecurity but is looking forward to a fresh start with her recently inherited wealth.

A 32-year-old jewelry designer in London struggling to establish her business while navigating personal relationships and finding her own strength.

The lead detective on a murder case, known for his keen observation skills and dedication to uncovering the truth, despite complex emotional connections to the people involved.

A witty and charming man who enters into relationships with a veneer of sophistication, concealing a controlling and abusive nature underneath.

Lucy’s daughter who was adopted after being found in a house with a troubled past, newly reconnected with her birth family.

Childhood acquaintance of Henry who becomes a focal point of Henry’s obsession, now living a life of searching for meaning after childhood trauma.

A violin player whose remains are discovered 25 years after her murder, formerly a resident of the house on Cheyne Walk and associated with its complex dynamics.

Former boyfriend of Birdie and a past resident of the Cheyne Walk house, whose history is intertwined with the darker elements of the household's past.

Lucy’s teenage son who enjoys detective work and helps track down family members, representing a younger generation's perspective and resilience.