Hate Story 3 story is about Aditya Singh(Sharman Joshi) and Siya Singh( Zarine Khan) are a highly successful couple who run a huge empire. One fine day, they get a huge car as a gift. Upon investigation, they find out that the gift is from yet another rich business man Saurabh Singhania (Karan Singh Grover).Intrigued by this, Aditya and Siya arrange a meeting with Saurabh. During this meeting, Saurabh promises the couple that he is ready to solve all their major problems in business only if Aditya allows his wife to spend a night with him. A furious Aditya leaves the meeting with his wife.A disturbed Saurabh now decides to destroy Aditya’s empire and manages to successfully do so. Left with no choice, Aditya sends his personal secretary Kaaya(Daisy Shah) to find out Saurabh’s motto behind all this.Who is this Saurabh ? What is his connection with the Aditya’s ? and will Kaaya successfully find out the truth behind all this.