Rajiv Kaul, Sanjay Suri, is celebrating his 40th birthday with friends when a chance encounter with a mysterious woman, Sandy, Nora Fatehi, sparks a fleeting intimacy. The night takes a brutal turn as she is killed by shards of glass in the back of her head. Rajiv is left staring at a blood-soaked pillow, gulping down alcohol and sleeping pills to dull the shock. What follows feels like a dream at first, but the day slowly starts to blur the line between illusion and reality, pulling him into a mystery that refuses to stay contained in his dreams.
As the day unfolds, Rajiv discovers that Sandy is not gone. He phones a friend to confirm if Sandy is even in town for the evening, only to learn that his friend was never informed of such plans. The truth surfaces: Sandy is alive and staying at a hotel, and Rajiv is drawn back toward her. He learns that Sandy is the same woman he met years earlier during a magazine shoot, with whom he shared a night he barely remembers.
In the hotel room, Sandy tries to rekindle their connection, but Rajiv is haunted by the memory of her supposed death. He tells her what he saw, and when she hugs him, the memory hits him with a jolt, and he pushes her away in fear. She collapses onto a broken glass, blood spreading across the floor, and Rajiv is thrown into a spiraling fear that the dream has intruded into his waking life.
On the drive home, a routine police stop for speeding adds to the confusion as Rajiv is shown his license and a photo of his father tucked in his wallet. A childhood memory surfaces—their dinner-table fights and the eventual separation of his parents. A remote road, a smoking engine, and a mechanic appearing from nowhere with a toolkit and a birthday greeting intensify the mystery. The mechanic mutters a cryptic line, and then vanishes: Apki Sandy ready hai, sir. Rajiv searches for him, but the mechanic has disappeared.
The day becomes a loop of memories: visions of happier moments with his wife on anniversaries, punctuated by the recurring sight of Sandy’s blood-streaked head. He heads toward his wife’s family home, only to stumble upon a secret: his wife, Zenia Starr Ritu, is involved with his friend Vicky, and they had secretly planned a Bali trip for his birthday. Devastated and confused, Rajiv confesses that he murdered someone, and Ritu accuses him of cheating, reminding him that she had tried to reach him multiple times. He recalls leaving his phone in the hotel room and dashes back to the hotel to verify Sandy’s presence. There is no booking under Sandy’s name, and the receptionist looks up the records, only to eventually call him back with his phone in hand. He races home, hoping the nightmare has ended.
A birthday party awaits him, a lavish reunion organized by his wife and friends, with Sandy among the guests. The atmosphere seems to offer closure and forgiveness, and Rajiv thinks the storm has passed. He wakes up to find the party already finished, the room empty, and Sandy lying on the bed with a bloodied head. Examining her ID reveals a shocking truth: she was his step-sister. A flashback unravels the family history—Sandy was the sister who had gone to Canada with their mother when their parents separated—turning the supposed recovery into a troubling revelation that dredges up long-buried memories and darker family secrets.
