The year is 1982. Young gynecologist Dr. Ivan Genadiev gets a present from destiny – after years of unsuccessful attempts, his wife finally gets pregnant. Their joy is short-lived. The baby is born with the Tetralogy of Fallot, a type of heart defect present at birth. Doctors say the newborn won’t live long. Devastated, Genadiev decides to outwit destiny, replacing his sick baby for the healthy child of a woman who died in labour.

Hours after the swap, Genadiev tells the husband of the diseased woman that his wife had died in labour, and the baby had inherent heart disorder. The father’s life turns upside down – until the age of 6, young Alexander is on the brink of survival, suffering frequent hypoxic crises and constantly staying in hospitals. Then real hell unfolds – Alexander undergoes a series of heart surgeries with unclear outcome. The father succumbs to pressure and becomes alcoholic. Alexander’s case is taken up by an innovative cardiac surgeon, who saves his life and becomes his mentor, introducing him to the vast world of medicine. Alexander graduates from the Medical University in Varna and dreams of joining the elite of the profession, starting work at a Sofia-based hospital managed by Prof. Ivan Genadiev, who has meanwhile become a legend in medical circles.

The year is 2015. Based on recommendations from the cardiac surgeon, who had once performed the operation on young Alexander’s ill heart, Prof. Genadiev hires the ambitious young surgeon. Destiny brings together the unknowing father and son to seek redemption for Alexander’s stolen life. While in the hospital, Alexander meets Dr. Kalin Genadiev, not suspecting he was actually the child the professor had once stolen, while he was the actual son of the person that Alexander now calls his father. Kalin is engaged to beautiful anesthesiologist Bilyana Zaharieva, who however falls deeply in love with Alexander. Their secret love comes to light, causing huge repercussions across the hospital. Their love is particularly painful for Kalin’s parents, Prof. Genadiev and Evgenia. However, all this is nothing compared to the revelation about to shake Genadiev, when he finds out that his real son was still alive, and Evgenia’s huge shock upon learning she had been raising someone else’s child and only now, 33 years later, she would meet the child she had actually given birth to…