The series "Nevidimaya nit" is a melodrama about the complex intertwining of two destinies. Lada and Rada are two unfamiliar and completely different girls. The first grew up in an orphanage and dreams of having a family. The second, on the contrary, is the heiress of a wealthy industrialist with a huge clan of relatives. When Rada gets into an accident outside Lada's house, she takes her to the hospital and helps save her life. In gratitude, the wealthy girl brings the orphan into her home and introduces her to her family. But this act leads to unexpected consequences...