The story of two couples - each with their own struggles to survive as a couple and as individuals. After living in London for a few years, Rahul and Nandita have recently moved back to Kolkata and become friends with Amit and Preeti. It is the lives of these four friends that creates a resonance, a chord, that echoes through their present and future.
| Actor | Role |
|---|---|
 Rahul BoseRahul Chatterjee | Rahul Chatterjee |
 Rituparna SenguptaNandita Sen | Nandita Sen |
 Raima SenPreeti Banerjee | Preeti Banerjee |
 Rajat KapoorAmit Banerjee | Amit Banerjee |
 Haradhan BandyopadhyayNandita's father | Nandita's father |
 Mithu ChakrabartyNandita's sister | Nandita's sister |
 Barun ChandaRahul's boss in Kolkata | Rahul's boss in Kolkata |
 Rohit MukherjeeRahul's colleague | Rahul's colleague |
| DDolly BasuPreeti's mother | Preeti's mother |
 Shantilal MukherjeePoliceman | Policeman |
| BBodhisattva MazumdarNandita's brother-in-law | Nandita's brother-in-law |
| KKunal PadhiNot listed | Not listed |
 Bibhu BhattacharyaNot listed | Not listed |