Ajay alias Munna Babu is a semi-senile, gentle but naive young man who has a wealthy family estate. His employees and alleged well-wishers conspire against him and introduce him to his long-estranged mother, Shakuntala, and brother, Vijay. Munna is overjoyed, not knowing that they are devious impersonators. This joy is quite short-lived, as they soon show their true colors, and Munna gets killed. His restless spirit seeks out his real brother and appeals to him to avenge his death. Vijay, at first, thinks he is hallucinating, but when his mother confirms that he indeed had a twin brother, he agrees to accompany Munna's spirit back to where he was killed, and thus assist him complete his vengeance. Things do not go as planned, and Vijay himself becomes their victim, and may face the very same fate as Munna.
Sanjay Dutt makes his film debut. Shamlal is a union leader for the workers of construction company Ratanlal, who is tragically killed just when safety negotiations begin, leaving behind a devastated family. Shamlal's youngest son Rakesh takes his father's death the hardest, having fits whenever his family comes near. As a result, he is given up for adoption, and renamed Rocky, and assumes a carefree life with a new family. When Rocky reaches adulthood he falls in love, only to reveal buried traumas about his past.
The plot revolves around a train named Super Express that catches fire on its inaugural run from New Delhi to Mumbai.
Nirmala Gupta rules her household with an iron fist. While most of her family resents it, they do comply and try to appease to her. When her daughter-in-law's free-spirited sister comes over to stay for a few days, things in the Gupta family start to change, agitating Nirmala.
Concerned over the rising death of low-caste people in a remote town in India, the Central Bureau of Investigation assigns this task to Inspector Ravi Kapoor and instructs him to go incognito to investigate these deaths. Upon arrival, Ravi is received by Collector Rahu Nath, to whom Ravi introduces himself as a Horticulturist. Thereafter Ravi lives in a small house that was owned by a man named Mohandas, who had died under mysterious circumstances. Mohandas' children, Tulsi and her brother live there now. Ravi and Tulsi fall in love with each other, Ravi offers them all possible protection if Tulsi and her brother help him with the investigation, to which Tulsi agrees. Before Ravi could take any steps he is arrested by the local Police Inspector Thakur and lodged in a cell. And the only way he can get out by revealing his identity - which can seriously jeopardize the entire investigation.
A new Sanskrit teacher (Dharmendra) comes to teach at a girls' school. The chemistry teacher (Hema Malini) becomes annoyed at his style of teaching. He falls in love with her and tries to win her over.
Suraj, an NRI, moves back to India, only to realise that the caretaker of his property, Kalicharan, is now running a drug racket on his land. He helps the police force to track down Kalicharan.
Sulekha is in awe of her brother-in-law Raghavendra for his intelligence. Parimal, her husband, decides to take up the challenge of fooling Raghavendra and goes to work for him as a driver.
Mala, an aspiring Bollywood actress, witnesses a murder and boards a Goa-bound bus to escape the killer. On the journey, she meets exciting people from different cultures and a young man who will not leave her side.
Old woman Anandi moves to the city with her relatives and finds out their material side. She develops fondness for two rival street gangs of unemployed youth. These gangs are headed by two former friends turned foes in a time when society, politics and education are all losing their bearings in 1970s India.
A simple man from a village falls in love with his new neighbor. He enlists the help of his musical-theater friends to woo the lovely girl-next-door away from her music teacher.
Bipinchandra breaks family tradition by marrying a city girl, Hemangini, much to the chagrin of his sister-in-law, Kadambini, and her husband, Navinchandra. Things are delicate even after both women give birth to two children each. Then Hemangini testifies against Navinchandra in Court, leading to the division of the property. Things got worse by the arrival of Kadambini's orphaned school-going step-brother, Kishan, who is beaten and abused by not only by Kadambini and Navinchandra, but also by their overweight son. When Hemangini objects to Kishan's ill-treatment, Bipin takes the side of the rest of the family, and may probably force her to abandon Kishan to his fate or divorce her.