In Mary Kay Andrews' Der geheime Schwimmclub (original title The Newcomer ), Letty Carnahan flees New York with her young niece, Maya, to a Florida motel after her sister is murdered. Seeking refuge, Letty finds an unexpected support system in a group of local elderly women who swim daily and a budding romance with a police detective, Joe. The plot revolves around Letty hiding her past, protecting her niece, and navigating a tense, unfolding mystery.