A (Ad Infinitum) (2021) Characters, Setting & Themes Explained

The story takes place primarily in Hyderabad, India, and its surrounding areas. It moves between a city hospital, where Sanjeev rebuilds his life after memory loss, and a remote forest that holds secrets about his true identity. The contrast between the clinical hospital setting and the untamed forest underscores the dual realities the characters navigate.

• hyderabad
• hospital
• forest
• setting
• india

The narrative is set in present-day India (early 2020s), featuring modern hospitals, NGOs, and CCTV-driven investigations. However, it also includes flashbacks to India's Emergency era (mid-1970s), connecting past political turmoil to present-day crimes. The story weaves between these two time periods to reveal how historical events shape the current mystery.

• emergency era
• present day
• flashbacks
• india
• 2020s

The central theme is identity and self-discovery. Sanjeev's amnesia drives the mystery as he struggles to recall his past. The revelation of his dual identity as both Sanjeev and Ashwatthama (also known as Nithin Prasanna) forces him to confront a fractured sense of self. The movie explores how memory, family, and history fuse to define who we really are.

• identity
• amnesia
• memory loss
• ashwatthama
• self discovery

The movie explores immortality through a dangerous scientific pursuit to halt aging via brain and pituitary experiments. Arjun, Sanjeev's brother, becomes obsessed with manipulating the pituitary gland to stop the aging process. He experiments on himself and uses the research to further a conspiracy. The narrative questions the ethical boundaries of science and what cost humanity pays in the pursuit of endless life.

• immortality
• aging
• pituitar
• experiments
• science

Justice is a key theme as law enforcement pursues a shadowy legacy tied to political turmoil from the Emergency era. Officer Vishnu leads the investigation into disappearances of orphans and runaways, using CCTV evidence and witness testimony. The investigation tests alibis and loyalties as the truth emerges. The story challenges how justice is pursued and whether true accountability is achievable.

• justice
• investigation
• police
• accountabilit
• emergency era

Sanjeev is the protagonist, a disabled hospital receptionist suffering from amnesia who cannot recall his past. He is revealed to have a dual identity as both Sanjeev and Ashwatthama, with his real name being Nithin Prasanna. His pursuit of identity pulls him into a dangerous conspiracy tied to an immortality project, reshaping his moral trajectory throughout the story.

• sanjeev
• ashwatthama
• nithin prasanna
• protagonist
• amnesia

Ammu (Amrutha) is Sanjeev and Pallavi's daughter who becomes a pivotal figure in the abduction case. She is described as holding the key to duplicating the immortality process that Arjun developed. Her existence is entangled with the immortality quest, making her the innocent focal point around which danger and hope revolve.

• ammu
• amrutha
• daughter
• immortality
• kidnap

Arjun is Sanjeev's brother and a doctor who becomes the primary antagonist. He is obsessed with manipulating the pituitary gland to stop aging, perfecting the immortality process on himself first. Using his research to advance the conspiracy, he pursues endless life at any cost, becoming the main threat the protagonist must face.

• arjun
• brother
• doctor
• antagonist
• immortality

Pallavi is Sanjeev's wife and a nurse at the hospital where he works. She wants to protect their daughter Ammu and maintain stability for their family. She challenges Sanjeev's urge to investigate his past, fearing it may endanger their daughter. Her practicality and care keep the family grounded amid the mounting secrets.

• pallavi
• wife
• nurse
• family
• protection

Officer Vishnu is a detective with the Preventive Crimes Unit investigating the disappearances of orphans and runaways. He meticulously pieces together clues from CCTV footage and witness testimony, pursuing leads fiercely even as evidence begins pointing toward Sanjeev. His investigation connects the historical Emergency era events to present-day crimes.

• vishnu
• detective
• police
• investigation
• crime

Ashwatthama is a historical figure from India's Emergency era whose photograph links to Sanjeev's past. He is revealed to be the original identity behind the immortality project, a haunting presence from decades past that guides the danger unfolding in the present. His legacy forms the foundation of the conspiracy.

• ashwatthama
• emergency era
• historical figure
• immortality project

The hospital represents a clinical, controlled space where Sanjeev rebuilds his life after memory loss, a place of healing and new beginnings. The forest, in contrast, is untamed and hides the dark past and origin of his true identity. This contrast underscores the dual realities the characters face: the orderly surface of modern life versus the dangerous hidden truths of the past.

• forest
• hospital
• contrast
• setting
• duality