On a Sunday morning in Beirut, frustrated Mona and her miserable taxi-driver husband Abu Rami set out for a drive across Lebanon to visit their son Rami and his wife. After 40 years of marriage, the couple nag and squabble and Mona is plagued with doubts about his fidelity. When the car breaks down in the middle of nowhere, Abu Rami and Mona are stranded without help. While waiting, tensions rise and Mona confronts her husband with her suspicions. He angrily dismisses her thoughts as absurd, but is eventually overcome by guilt and confesses to leading a double life. Mona is devastated and abandons Abu Rami on the side of the road, but not before shattering his world with a secret of her own.
