| Director | Avijit Sen |
|---|---|
| Box office | ₹7 crore |
Tonic tells us the story of 75-year-old retired man, Jaladhar Sen who lives with his wife, son, daughter-in-law and granddaughter. Their relationship has become sour because of the dominating attitude and over-possessiveness of their son. The story revolves around the old couple's problems as a result of their son's misbehaviour and the problems intensify when their son and daughter-in-law celebrate their own marriage anniversary in a grand way but the 46th marriage anniversary celebration of the old couple is planned to be just a small get-together. The old couple plans a foreign trip and comes across a travel agent named Tonic, who later turns out to be a miracle maker in life. However, the foreign trip is cancelled as the passport of Jaladhar's wife gets rejected because of non-availability of some important documents. Jaladhar rebukes Tonic for shattering all his dreams and taunts him for making false promises. But later, the old couple plans for a secret trip to Darjeeling with Tonic for company. They leave in the middle of the night leaving their son worried about them. Jaladhar and his wife have the time of their lives and enjoy themselves like never before. Jaladhar goes for a lot of adventure sports like rock-climbing, paragliding, river-rafting and other activities. He wins over his fears and relives his lost youth. Later, Tonic celebrates Jaladhar's anniversary in a grand way and reveals to Jaladhar's wife that his parents died when he was settled abroad. So, he decided to help all those old couples who wanted to live their lives to the fullest. Jaladhar suddenly falls sick and is admitted to the hospital. His son arrives soon and threatens to file a police complaint against Tonic. But he changes his mind when he learns how Tonic gave his parents new life. They all decide to take a trip to Paris at the end of the film. The refreshing presence of Tonic brings back happiness, peace and love in the Sen family. Tonic lives up to his name and heals Jaladhar's life. Jaladhar expresses how grateful he is to Tonic for it is because of him that he experienced what fun meant.