It’s a joyride with a fair amount of bumps and de tours. At places genuinely funny, at times hyperbolized and even begging the viewers to feel sympathy for the self-sacrificing bumbling do-gooder Prem, Ajab Prem Ki Ghazab Kahani is a screwball comedy going zig-zag throughout its running course of two and half hours.
Prem (Ranbir Kapoor) and problems are twins. Wherever Prem goes, the twin inevitably follows. He rides a cycle without breaks and bangs right between the legs of a robber (ouch!) and almost becomes a hero in the eyes of his townsfolk. He is the President of the cash-strapped Happy Club located right inside a coffin shop. Prem’s mantra? Make others happy. Only Prem’s father (Darshan Zariwala) isn’t happy with his day-dreamer and idler of a son.
Then enters Jenny (Katrina Kaif), and Prem falls head-over-heels for her. For him she’s a chalti phirti Vanilla ice-cream with silky baal and milky gaal. But is he a match for her? She loves books. He’s ninth fail. Her Mr. Right would be a working man who also gives time to his family. Prem is neither. He decides to change himself.
Phir kya! Prem takes up job of making laddoos at a halwai shop and becomes a good son for his dad and mom. All this he does for Jenny; to win her love. And whenever Jenny is in trouble, Prem goes full throttle to help her. He even takes Jenny’s troubles upon himself only to find out that she loves someone else.