Gangaa is the story of a little girl who only loves two things in life, her papa and her self-respect. She gets married off at a tender age, unfortunately she loses her father and husband on the same day. She’s forcefully moved to a home for widows, she’s saved by Niranjan when Sudha tries to forcefully cut off Gangaa's hair. We get introduced to Niranjan's family and his mother starts to question who Gangaa is. Amma puts Niranjan in a very difficult position as he has to choose between her and Gangaa. Gangaa realises that in order for her to gain entry into Niranjan's house, she will have to befriend his son, Sagar.