Krishnanum Radhayum

John changed his name to Krishnan to secure rental housing from Yeshodha and her daughter Rugmini, who would only rent to Hindu tenants. Since John is Christian and Radha is Hindu, the name change was a disguise to get around the religious condition and allow the couple to rent part of the house.

The exact motivation is not fully explained in the film, but Rugmini's Uncle likely discovered that John had deceived the family by changing his name to pose as a Hindu tenant. This religious deception, combined with existing tensions around the interfaith relationship, appears to have triggered his act of violence against Radha.

The earlier tensions around the couple's different religious backgrounds and the name disguise plant the seeds for this tragedy.

Radha became suspicious because Sreelatha started calling John daily to thank him and even invited him to participate in interview preparations. The attention and frequent contact from a woman who had recently lost her husband made Radha uneasy, creating tension between the couple despite John having helped Sreelatha with good intentions.

After Radha was killed by Rugmini's Uncle, John sought revenge and confronted Rugmini's Uncle and his armed goons. In the violent confrontation, John killed them, which led to his arrest and imprisonment for murder.

The murder of Radha sets John on a path of vengeance that directly leads to his criminal actions.

John sought revenge because he was devastated and enraged by Radha's murder. The sudden loss of his wife while he was hospitalized triggered a need for justice and vengeance against Rugmini's Uncle and his goons, leading him to confront them violently.

After being released from prison, John returned to a life forever altered by the tragedies that unfolded. The relationships around him had changed irrevocably due to the interfaith love story, the murder of Radha, and his time in prison. The film suggests he begins a new phase while navigating the consequences of his actions.

John and Radha belonged to different religions, John was Christian and Radha was Hindu. Their families opposed the alliance because of this religious difference, creating pressure and scrutiny on the couple as they pursued their relationship and marriage.

John helped Sreelatha because he has a compassionate nature and instinctively helps anyone in trouble. He used crafty tactics to encourage her to eat and adopt a healthier routine after she refused to eat following her husband's death. His help was genuine, though it eventually caused misunderstandings with Radha.

John's brother was involved in a brutal street fight, and John intervened to defend him. During the confrontation, John sustained a serious head injury that required hospitalization. While he was in the hospital recovering, Radha went out to buy medicine for him and was killed.

The housing plan was central to the couple's struggle to build their life together. Yeshodha and Rugmini needed money and decided to rent part of their house, but only to Hindu tenants. This forced John to disguise himself by changing his name to Krishnan, which eventually contributed to the tragic events when the truth about his identity was discovered.