Good Bye is the story of a dysfunctional family that lives in Chandigarh headed by an ageing Harish (Amitabh Bachchan) his wife Gayatri (Neena Gupta), daughter Tara (Rashmika Mandanna) and sons Karan (Pavail Gulati), Nakul and an adopted son, Angad. Harish and Gayatri’s children are busy with their respective lives. One fine day Gayatri tries calling Tara and messages her but she ignores it as she is busy partying along with her live-in boyfriend Mudassar (Shivan Narang) after winning her maiden case as a lawyer. Gayatri passes away leaving Harish shattered. On hearing about her mother’s demise Tara rushes to Chandigarh to be with her father before Karan and Angad try to reach by the next available flight. Nakul, meanwhile, is unreachable. Harish wants to fulfil his wife’s last wish and follow certain customs and rituals which his children don’t agree which lead to clashes over the funeral ceremonies. What does Harish do, will he give into his children’s demands or go ahead with what he believes in. What happens next forms the rest of the story.