After twenty years of marriage, former violinist and mother-of-one Leonora suspects that her workaholic engineer husband Christian is cheating on her. And as guilty, late-night text messages excite her suspicions, Leonora embarks on a mission to unearth the truth. But when feeble explanations invite reasonable doubt, unbridled violence suddenly enters the equation, and no one is safe from harm. Once, Leonora and Christian promised to care for each other "till death do us part". Now, they both realise love was the biggest mistake of their life. Can the two partners work things out together like loving adults?