Black Swallowtail

Yana is a married thirty-six-year-old woman. She is also the head of the legal department of the largest bank in Primorye. Home, family, work, dog… She has plenty of troubles. And then, an intrusive skater-programmer with a rare name, Mstislav, appears. Is it a coincidence? And how is this related to hackers and a large-scale bank theft being prepared in the region? What is happening behind Yana's back? Why is her life going off the rails with the arrival of this guy?