The series follows Siri, a restaurant owner, and her husband novelist Jon, who lead a busy life in Stockholm with their two daughters. Every summer, they seek tranquillity at Siri’s childhood home on the Swedish West Coast. This summer, Siri plans an unwelcome 75th birthday party for her mother Jenny, and hires a nanny, Mille, to help. When Mille disappears during the party, the family is forced to confront hidden secrets and guilt. What happened to Mille, and who bears responsibility?