Ajab Prem Ki Ghazab Kahani is a romantic comedy film released in 2009, directed by Rajkumar Santoshi and starring Ranbir Kapoor and Katrina Kaif in lead roles. The film revolves around the story of a carefree young man named Prem (Ranbir Kapoor), who falls in love with a young woman named Jenny (Katrina Kaif) after a chance encounter. However, Jenny is already in love with someone else, and she fails to show up for a meeting with Prem.
Determined to find out what happened to her, Prem and his friends travel to Goa in search of Jenny. Along the way, they encounter a number of misadventures and obstacles, but they keep going, determined to find the woman that Prem loves.
When they finally find Jenny, they discover that she is in love with a man named Rahul (Upen Patel), who is a successful businessman. Despite his disappointment, Prem decides to help Jenny and Rahul get together, convinced that their love is true.
The rest of the film follows the ups and downs of Jenny and Rahul's relationship, as well as the growing affection between Prem and Jenny. Along the way, there are several hilarious misunderstandings and comedic set-pieces, culminating in a romantic and emotional finale that will leave audiences with a smile on their faces.