The TV series "Fatal Woman" tells the story of a long-standing and complicated love triangle. Andrey and Natalya Kovalev have been happily married for many years. But everything changes when their former classmate Maria Smirnova comes to their hometown from abroad. She used to date Andrey but left him for a successful career overseas. However, now she is in no hurry to return to her carefree and comfortable life. It turns out that she is still not indifferent to her former lover. Natasha will have to fight for her marriage.