Investigator Dasha and highly skilled professional Denis meet during group therapy for insomnia, a condition they both have long suffered from. This is the only thing they have in common, as Dasha is a perfectionist and an excellent student, while Denis is a slacker and a hard worker. Denis devotes his sleepless nights to a deep understanding of various areas of human activity, and Dasha realizes that no one can help her with a specific investigation better than Denis.