As a young child, we see Claire's world fall apart when her older sister disappears the last night of vacation and turns up dead a few days later. This unresolved murder case is long forgotten. When we meet Claire (no longer 7 years old, but a grown adult woman) run into a previous murder suspect in her sister's life. This chance encounter stirs up unanswered questions about both what happened to her sister, but importantly, who was her sister?