Arjun Patiala is a comedy-action drama about a Sikh cop Arjun (Diljit Dosanjh) who's short career has already turned into an eventful one by his arrival in the city which has managed to reduce the crime rate. His quirky and unusual ideas have not only found admirers in his equally interesting sidekick - Onida Singh (Varun Sharma) but also the firebrand reporter of a news channel, Ritu Randhawa (Kriti Sanon). Arjun and Ritu hit it off from day one as a series of hilarious incidents start to unfold from thereon leaving the audiences in splits.