1995, somewhere in the turmoil of the Balkan war. Amidst the roar of the falling grenades, the German doctor Karen Bender, together with her local colleague Viktor Novak, carries out a dramatic emergency operation in a makeshift field hospital. The well-rehearsed team of surgeons risk their lives to save a badly injured child. When the operation succeeds, Karen and Viktor narrowly escape to safety. Still in mortal fear, the two get closer and sleep together. But Karen is happily married and doesn't tell her husband about the infidelity so as not to jeopardize the marriage. Seven years later, the memory of Viktor has faded. The successful Munich specialist in plastic surgery is about to be appointed senior physician. together with her husband, the idealistic lawyer Christoph, and the bright seven-year-old daughter Kim, Karen enjoys life as a threesome. Everything seems perfect - until Kim is diagnosed with a congenital blood vessel malformation in the brainstem out of the blue. A complicated operation is inevitable. But the only specialist who has mastered this difficult procedure is Viktor Novak, now an internationally renowned neurosurgeon who is a guest at the Munich Clinic. Karen can't hide from Christoph for long that she was having an affair with Viktor. Christoph is deeply hurt, but for the sake of his daughter he pulls himself together and forgives his wife. Everything seems perfect - until Kim is diagnosed with a congenital blood vessel malformation in the brainstem out of the blue. A complicated operation is inevitable. But the only specialist who has mastered this difficult procedure is Viktor Novak, now an internationally renowned neurosurgeon who is a guest at the Munich Clinic. Karen can't hide from Christoph for long that she was having an affair with Viktor. Christoph is deeply hurt, but for the sake of his daughter he pulls himself together and forgives his wife. Everything seems perfect - until Kim is diagnosed with a congenital blood vessel malformation