Thirteen years after the murder of Fyodor Karamazov, Ivan Karamazov, an investigator in Moscow's Interior Ministry cold-case division, returns to his hometown. Seeking to prove his brother Dmitry innocent and uncover the truth, he begins a reinvestigation using an unprecedented method, but a new incident occurs.

A reinvestigation mystery in which Ivan pursues the true killer thirteen years after the patricide in The Brothers Karamazov.