[4] Successful neurosurgeon Yevgeny Vetrov enjoys a fulfilling life with the respect of colleagues and love of his wife, Irina.
During a significant contract signing, someone poisons Irina’s champagne, and she rushes home feeling ill, only to be attacked by an intruder.
A neighbor overhears Yevgeny’s anguished, self-blaming words, which leads to him being wrongfully accused of her murder and swiftly convicted due to circumstantial evidence.
Determined to prove his innocence and find the true killer, he returns to Moscow, pursued by special forces under Colonel Pakhomov, who harbors doubts about Yevgeny’s guilt.
With his name cleared, Yevgeny saves Pakhomov's paralyzed daughter with surgery and, honoring Irina’s wish, adopts the boy from the orphanage, watched over by her spirit with a serene smile.