Mundhanai Mudichu, a serial on Sun TV, is about 4 Sisters. The 3 younger sisters are married to brothers of the same family. The youngest sister is Swathi who got married to Karthick. Swathi and Karthick have a strong bond of love and affection. Due to certain critical situations, Karthick is acting as husband for Shyamala, who is married to his friend. Swathi happens to see a few photos of Karthick and Shyamala together in a temple and she suspects him.
Swathi is completely upset and she tries to commit suicide. Karthick tries to convince her but she is not ready to listen. So, Karthick attempts to commit suicide in front of the family and his dad starts beating him severely. At the same time, Shyamala comes to their home with her husband. She reveals the entire story and conveys that she has no relationship with Karthick.
Swathi feels bad for suspecting her husband and she apologizes to him. To know what happens in the life of other sisters, watch Mundhanai Mudichu in Sun TV at 6.30 PM on all week days.