The Yaransky family of doctors was considered prosperous. Peace, love and tranquility reigned in their home. The trouble came unexpectedly - something strange is happening to the daughter of Vadim and Larisa: her character suddenly changed, she left her boyfriend, broke up with friends and left the institute. Parents find no room for themselves, blaming each other, and now the spouses are already on the verge of divorce... But what was hidden behind the changes in their child? What the Yaranskys learned goes beyond understanding. How to live with this? Unclear. The couple made the only right choice: to unite and continue to live in a new reality, to be close so as not to go crazy... Moreover, as it turned out, the life of a little girl, a complete stranger, but so innocent and helpless, depends on these people. A girl facing a terrible threat. Whose life is in the balance! Will a husband and wife be able to save their own and someone else’s child? At what cost? Or maybe they will also be able to preserve their love.