Diary is a movie filled with love and action. A girl (Joya) who is a radio jockey believes god has a plan for everyone that they will meet their true soulmate at some point of life. She eventually finds a handsome boy named Swapnil who propose her while they are sitting in a couple bench of a park. After both are in relationship, a villein character role played by Rekha Thapa is introduced in Swapnil’s life. Rekha tries to eradicate him from the relationship with Joya while he tries to fight for his love.