"Sonu Ke Titu Sweety" revolves around the story of Sonu (played by Aashim Sehgal), who is on a mission to save his best friend, Titu (played by Shashank Khaitan), from getting married. Titu is about to tie the knot with Sweety (played by Kusha Kapila), and Sonu comes up with a plan to stop the wedding, believing it's not the right decision for Titu.