Best of Luck Nikki

The Singhs decide to go for a Diwali vacation to Udaipur but have numerous transportation difficulties involving a milk van, a missed train, and an errant flight. They decide to return home and Himani becomes upset with Avatar, but they discover their house decorated with lights by Pam and Popi as a surprise to cheer up Dolly. They all celebrate Diwali.

On the day of Holi, Avatar learns that a very special business person is visiting their house to arrange a business deal. He tells Himani to send kids away so that his deal won't be affected by them, but everything turns out to be the opposite.

Himani and Dolly go to Jaipur for an audition but are stuck under curfew. Himani's parents visit and find the house a mess in her absence; they phone Himani, telling her that Nikki is missing, and Himani panics and sneaks out of the hotel. They seek a ride from a man with a car but he is a car thief and all three are arrested. Himani gets a police uniform and takes Dolly in a police van to return home. Nikki is found and the family reunited, but the police come to arrest Himani. She explains her reasons and reveals that she is pregnant, and they let her go. Avatar and the others are anxious about having a fifth child in the family.

Dolly moves her study date with a cute boy, Ritesh, from the library to home because she has to help Avatar take care of Nikki while Himani returns to work. Avatar injures himself falling down the stairs, so Rohan must take him to the hospital where Himani works, leaving Dolly to watch Nikki.

Dolly encourages her parents to go out while the kids take care of the baby. Rohan flirts with a cute girl, Punam (Shivani Joshi), while minding Nikki--and accidentally brings the wrong baby home. After a failed search, the kids go to the restaurant to tell their parents--and find Nikki sitting with the cute girl's family a few tables over.

Dolly discovers that she has an Narendra Tauji (English: uncle her father doesn't speak of); she visits him and they go to a cricket game, where she realizes why they never got along. Sunny and Rohan try to make money modeling Nikki for a baby-store ad.

With a fifth Singh child on the way, Himani demands a larger house. Dolly and Ayaan audition for "Romeo and Juliet" at their college; Ayaan gets the lead opposite a school trustee's daughter who has a crush on him. Sunny and Roli Aunty pull an escalating series of pranks to see who gets the last laugh. When the family is almost done packing, Himani reminisces and tells Avatar that she wants the family to stay in their home.

The basketball team blame their losing streak on Dolly and Ayaan's relationship, so they fake a breakup in hopes the team will relax. Sunny starts acting on his best behaviour when he thinks his parents are considering sending him to a boarding school, a misunderstanding they do nothing to clear up.

Himani convinces Pam's mom to throw her a baby shower, but the shower takes an unexpected twist when Nikki blurts out all the horrible things Himani said about her guests, making them angrily leave. Rohan and Sunny compete to go to a cricket match with Avatar.