Dark Chocolate is a story where an enquiry is ordered into a missing person case. Ram Charan (Rajesh Sharma) is arrested. On interrogation he spills the beans about his employers Ishani Banerjee (Mahima Chaudhry) diabolical plan to eliminate her own sister. Ishani Banerjee is arrested from her apartment, and on their joint testimony, her second husband, Shadab Kapoor is picked up from Kolkata and flown to Mumbai. The court grants them judicial custody till the end of the month and all three are brought to Khar police station and thus begins their separate interrogation. In a Rashomon effect we see the various version of the same crime, along with flashbacks to the actual motive behind the killing by the three accused. Ishani’s early days in Guwahati, her molestation at the hand of her step father, her elopement with her boyfriend to Kolkata and betrayal, her marriage to the mentally deranged Goutam Das, her marriage to her Second husband, Shadab Kapoor, his downfall over a short period of time, her introduction to the elite Kolkata social circle and finally Victor Banerjee. Everything was sailing smoothly, till the time Reena (Riya Sen) enters their life. Ishani introduces Reena as her sister to Victor. After a few months, Ishani realizes her mistake as she feels Reena was slowly getting the upper hand in the family, as she begins to play both the father and son as suckers. All hell breaks loose when Ishani comes to know that Reena has become pregnant. Who was the father? Did Victor come to know that Reena was actually Ishanis daughter? Who was Reena’s father? Why was Rohit, Victor’s son wanting to marry Reena? Was Reena offered a huge sum of the money-laundering amount? Reena was killed on August 24th 2015, strangulated to death. But what was the motive? And who all were to gain from her death. Was it just the family, or were there people in position of power involved. Why was the commissioner of police transferred? Was Victor Banerjee really innocent? What happened to 170 million dollars invested in the sky media group? Why was the money trail never a part of the main investigation? Can a mother really kill her own daughter?