Dil Tera Aashiq (1993) is a classic masala movie, combining action, romance, family drama, youthful hijinks, and a whole lot of broad farce. Maybe too much broad farce. Tone is an issue.
Sonia Khanna (Madhuri Dixit) has a problem: she's highly intelligent and well-educated, but no one will give her a job. Actually,she has two problems; her mother (Anjana Mumtaz) has a persistent cough which has progressed to a bad case of Bollywood Mystery Disease (though from context it's almost certainly tuberculosis.) She needs money to get her mother treated, and also to continue to eat.
Chaudhary Ranbir Singh (Anupam Kher) also has a problem. He threw his sister Radha (Aparajita) out of the house years ago after she dared to fall in love with a poor man, and he's spent the decades since carefully insulating himself from love, making his status as a bachelor a point of pride. But Radha has died, leaving behind two young children (Master Monty and Baby Tina) and one technically adult son,Vijay (Salman Khan.) Actually Chaudhary has two problems: the children are terrible in the way that only children in movies can be, and their relentless pranking has driven away every potential nanny or governess in Ooty. He needs to find someone who can handle the kids, and he insists that she should be an older woman.
The solution is obvious - Sonia puts on a grey wig, a pair of glasses, and a slightly different voice and becomes Savitri Devi, governess. On the train to Ooty she meets Vijay, and because he's an early Salman Khan character he attempts to win her heart by annoying the hell out of her. This doesn't work.
The kids immediately try to drive Savitri Devi away with their various pranks, and Chaudhary threatens them, but Savitri/Sonia stands up for them. This is enough to win over the kids, so they immediately become well-behaved and practically vanish from the film. It's also enough to win over Chaudhary - the resulting crush hits him with the force of several years of bachelorhood,and he immediately resolves to win over the age appropriate (he thinks) beauty who has walked into his life, and he enlists the help of his best friend, failed actor and drama teacher Naseeb Kumar (Kader Khan).
Kumar, meanwhile, is having trouble attracting students to his acting school, so he decides to offer dance classes, and hires two new dance teachers: Vijay and Sonia-as-Sonia - she needs another job to help pay for the increased cost of her mother's medication. This gives the pair plenty of time to get to know each other, and plenty of chances for Vijay to try and fail to improve that bad first impression.
Chaudhary actually has three problems. As the local Thakur he shut down the factory belonging to local wrong'un Pratap Singh (Tej Sapru), who was using it as a front for drug manufacturing. Pratap is under pressure from the international gang lord known as the Black Eye (Shakti Kapoor with a silly mustache) to get the factory reopened, but it can't be opened until Chaudhary signs the appropriate papers, and while he may be a loveless and joyless miser in desperate need of a visit form three spirits, he is a man of principle.
While he's working on a tight deadline, Pratap still finds time to be evil in other ways, so he attempts to assault Sonia. She's saved by Vijay, and now she likes Vijay while he is pretending to play hard to get. After some comic business, they work things out, so the movie takes a turn for the David Dhawanesque, with Sonia juggling her blossoming relationship with Vijay and Chaudhary's growing infatuation with Savitru Devi. Everything's going well until Pratap sees through her flimsy disguise and decides to blackmail her, while Vijay sees Sonia and Pratap together and leaps to exactly the wrong conclusion.
This is very early 90's Bollywood comedy; the tone is all over the place, and the plot dissolves into a cloudof dust if you look at it too hard. However, Sonia is a surprisingly strong heroine for the era. She drives the plot, she makes most of the choices (even if some of them are terrible), she gets her fair share of the goofy comedy beats, and she even gets to join in on the final fight, punching her fair share of the Black Eye's goons.
However, while Sonia's portrayal has aged surprisingly well, other aspects of the film have not. the script takes some cheap shots, particularly aimed at Guddi Maruti's overweight and overenthusiastic train passenger and veteran supporting actor Asrani's flamboyant dance master. And one of the early songs is sponsored by cosmetic company Emami's skin-lightening cream, complete with giant bottles hanging on stage. The movie is quick to move on to the next joke or fight or tearful confession, but that just means the tone is wildly inconsistent. Madhuri's great, but the movie is no better than it ought to be.