Hum Saath-Saath Hain: We Stand United is a 1999 Indian Bollywood film written and directed by Sooraj R. Barjatya. The film was distributed by the home production of Sooraj Barjatya, Rajshri Productions. The film stars Salman Khan, Karisma Kapoor, Saif Ali Khan, Sonali Bendre, Mohnish Behl and Tabu. The story centers on a family headed by Ramkishen (Alok Nath), his wife Mamta (Reema Lagoo), and their three sons, played by the leading actors.
The first half of the movie is pure family fun and full of love. The eldest son, Vivek (Mohnish Behl), meets Sadhna (Tabu). Sadhna is immediately attracted to him. She meets him first at his parents anniversary party. She is immediately taken by the love he has for his parents, despite Mamta (Reema Lagoo) not being his biological mother. Sadhna's father goes to visit Ramkishen (Alok Nath), explaining that he took Sadhna to the party so she could meet Vivek and asks for Sandhna's marriage proposal. Ramkishen is overjoyed, being as the family was worrying about Vivek's marital life. Vivek on the other hand is not looking forward to this union.
Vivek lost the use of his hand to save his younger brother's lives many, many years ago, and thinks his hand would be too much of a burden on Sadhna. But Sadhna continues to stick by her decision. Vivek is touched by her dedication to him, so the two are then married.
So now we move onto the sweet childhood love story of Prem (Salman Khan) and Preeti (Sonali Bendre). These two have had a crush on each other since they were little kids, but have never ever spoken of their love for each other. Although it is quite obvious, neither are exactly sure of the other's feelings. It doesn't really matter because they are to have an arranged marriage. Their engagement is finalised after a hilarious comedy scene in which Vinod (Saif Ali Khan) and Sapna (Karishma Kapoor) pretend to be Prem & Preeti, acting like they like each other. Vinod and Sapna are the youngest couple and are very fun-loving and flirty with each other. The three brothers also have a sister, Sangeeta (Neelam) who is married and has a daughter and she lives with her husband's brother and family. The twist to the story comes when Sangeeta's brother-in-law throws his brother out of the house without any share in the property and this leads three of Mamta's snobby friends along with Sapna's father into persuading Mamta to separate the three brothers to prevent a similar situation where Vivek might throw out Prem and Vinod. They convince Mamta into thinking that if the three brothers live in the same house with all of their wives and future kids, then fights and complications will occur. This leads to a tangled web of problems and sadness. Sadhna also becomes pregnant in the midst of all the trouble. Vivek and Sadhna move to Rampur to finish their factory. Sangeeta's brother-in-law has loss in his business and other family problems then he realizes the mistake he did. He accepts Sangeeta and her husband back. Sangeeta explains to her mother how Vivek had helped her during crisis. Mamta's brother explains to her that she's not beng fair to Vivek and she doesn't have trust in the values she gave her sons. Mamta realizes her fault and calls Vivek and Sadhna back. Sadhna's baby is born. Prem and Vinod also get married.