Pizza 3: The Mummy

A man comes home carrying a Barbie doll for his daughter and his son finds a camera. The husband then reveals a mini mummy sarcophagus statue, which his wife jokes about him collecting. When the electricity fails, the family lights candles and the atmosphere grows tense as the kids settle in for the night.

The father agrees to tell a horror story, prompting the second son to request something scarier. He recounts a memory about a basketball game where a player suffered a stroke, and rumors circulate that the father may have influenced the incident. The tale plants doubts and a sense that something unsettled is watching the family.

The father's worry grows as a family quarrel erupts over the rumor of his involvement in the past incident. He tries to calm the kids and sends them to bed, but a haunting begins in earnest. A singing toy turns on, he investigates with a flashlight, and the apparition of the dead player appears in the mirror before the father is struck down.

A news program debates whether ghosts exist, featuring Kayal, a young app developer who claims to converse with spirits. Her live demo goes awry, raising doubts and fear. The segment mentions a tiny mummy created by an Egyptian queen that stores negative energies and is tied to Chennai.

Nalan, a restaurant owner, is hoping to ask Kayal’s brother for her hand in marriage, but Prem objects and pushes for Aravind as a wealthier match. A customer leaves behind a small mummy sarcophagus on a shelf in the restaurant, subtly linking to the looming supernatural events.

Strange things begin in the kitchen: lights switch on by themselves and clean utensils turn dirty, while a mysterious sweet dish appears in the fridge. The staff suspect Nalan secretly makes it, but he cannot explain its repeated appearances. The inexplicable happenings heighten the sense of a malevolent presence.

Nalan meets Veera, who hands him the papers of ownership for the restaurant and praises his hard work. Veera hints at a deeper connection between the business and the strange happenings surrounding it. The transfer signals a shift that intensifies the supernatural mystery.

Nalan delivers food to Veera's house after a late-night call, only to find Veera alone with a malevolent presence and the ghost claims him. Veera dies in the house as the haunting seals its grip. Prem begins to suspect Nalan because he delivered the meal, fueling the investigation.

Aravind is killed, and Prem’s suspicion shifts back to Nalan, prompting Kayal and Nalan to investigate with the help of Kayal’s app. The case becomes tangled with the supernatural and the romantic tensions in Kayal's family. Their search drives them toward the restaurant's dark past.

A librarian suggests tracing the restaurant's former owner, Mitra, who ran a sweet shop with her mother. They learn Mitra’s family no longer lives in the apartment, and a security guard hints at a tragic past. The mystery widens to include Mitra as a key figure behind the haunting.

Nalan secretly breaks into Mitra's apartment at night and discovers a drawing Mitra made of Aravind. The secretary and security confront him, and an elevator accident soon follows, killing the security guard. The incident links Mitra to the present haunting.

A flashback reveals Mitra’s life: after a cricket accident, she develops amnesia and her mother struggles to care for her. A predatory watchman abuses Mitra in the building, and a brutal conspiracy involving the secretary, Veera, Aravind, and the security leads to Mitra's and her mother's deaths. The mummy’s power awakens their spirits, driving vengeance.

With Mitra and her mother's deaths, their spirits are empowered by the mummy, and they begin to take revenge on their tormentors. Veera, Aravind, and the security fall to the supernatural forces, revealing the dark consequences of their actions. The hauntings clarify the link between Mitra's tragedy and the current events.

The apartment secretary attempts to escape the spirits with a ghostbuster, but the plan proves useless against the vengeful entities. The haunting continues to escalate as hope for a simple fix fades.

In the end, Mitra's and her mother's spirits unite and depart, freeing Nalan from the haunting. The curse on the restaurant lifts, and life returns to a fragile normalcy in Chennai as the two families find peace.