Harpreet Kaur aka Happy (Sonakshi Sinha) is an aspiring Horticulture professor and leaves for China to do the job. Facing some issues at home, her father is unaware about her location. In China, a set of bad guys are waiting for another Happy (Diana Penty) which is also about to land with her ‘singer’ husband Guddu (Ali Fazal). Both the Happy(s) pick up the wrong driver & their fate gets turned.
The bad guys are looking for Happy No.1 (Diana Penty) but they pick up Happy No. 2 (Sonakshi Sinha). The Horticulture college people pick up Happy No. 1 (Diana Penty) and Guddu. The story gets interesting when Daman Singh Bhagga (Jimmy Sheirgill) and Usman Afridi (Piyush Mishra) also get abducted to come and find the real happy in China. This comedy of errors continue unfolding many unknown aspects to the story introducing many characters, mainly Khushwant Singh Gill (Jassi Gill).