The Russian melodramatic series "Rainbow in the Sky" tells the story of a young woman named Maria. She was happy with her partner Alexey, but his death in a car accident was a heavy blow for her. Even their daughter Polya does not bring joy to Maria after her husband's death. However, Maria does not yet know the horror she will soon face. It turns out that the car accident was not a tragic accident at all, and her deceased husband is not at all who he pretended to be in their family life.