It is revealed that Paappan was dismissed from service several years earlier for trying to fabricate evidence to ensure that Chacko is sentenced to capital punishment.
Chacko was imprisoned for various other offences, but escaped conviction and capital punishment for many of his murders due to the absence of original dagger as evidence.
In investigation, it is revealed that Aisha Fathima was a fake name and the woman was actually a nun who works at the orphanage which takes care of Chacko's mother Kunjamma.
Bhaskar holds a press meeting and falsely closes the case in order to lure the real killer.
Subsequently, Vincy's husband Siddharth receives a package containing an invitation to attend a meet-the-author ceremony of a book 'Rahasya-the killer has a past'.
The package also contained the book titled Rahasya-the killer has a past with pages 95 and 96 torn, which leads them to suspect the numbers when read together could be a date 26-8-95/96.
Paappan and Michael learn about Simon, who was accused of absconding after stealing a golden cross from the church of Pulimala.
He learns that Simon and his upper-caste classmate Bennitta Issac Puthenpuraykal were in love, but her family learnt this and fixed Bennita's marriage to someone else on 26 August 1996.
Paappan finds it odd that Simon and the golden cross goes missing on the eve of Bennitta's fixed marriage.
Paappan interrogates Bennitta and learns that Simon was brutally murdered by her family, Rajan, Jayashankar, Soman and Fr.
Bennitta had to helplessly watch Simon being killed, burnt to death and later blamed for stealing the cross and running away.
Paappan and Bhaskar find Simon's skeletal remains and the lost golden cross of the Pulimala church near the place where Rajan's body had been found in the beginning.
A young Solomon, aware of Paappan's identity as a police officer, had rushed to his place of stay and begged him to accompany him to save his elder brother who was going to be killed.
Solomon locks Vincy in a coffin and puts it in the electric crematorium in the church cemetery and sets it alight.
In a fight, Paappan manages to open the machine and save Vincy but Michael who intervenes to help, is held at gunpoint by Solomon.
Writer RJ Shaan, cinematographer Ajay David Kachappilly and composer Jakes Bejoy were also reported to be part of the film.
Sunny Wayne, Neeta Pillai, Gokul Suresh, Kaniha and Asha Sharath were also signed to be part of the film.
[15] On his discharge, he was asked to contest as the NDA candidate in the 2021 Kerala Legislative Assembly election from Thrissur and began campaigning.