Selena Murphy's mundane commute home is interrupted when she engages in a seemingly harmless conversation with the enigmatic Martha. As secrets about extramarital affairs are exchanged, the two women unwittingly establish a connection that will reverberate through their lives. Following their encounter, the inexplicable disappearance of Selena's nanny propels her into a whirlwind investigation. Embroiled in the chaos of a fractured marriage and the search for truth, Selena confronts the elusive question: Who really is Martha? In navigating a labyrinth of deceit, Selena is on the verge of unveiling a disturbing reality that she may not be prepared to face.