sentence: Ratan disguises himself as Ratnadeep Sengupta and under this guise meets Mohana to charm her as he believes she is the key to the GuhaThakurta household.
modified: fix grammar: Ratan disguises himself as Ratnadeep Sengupta and under this guise meets Mohana to charming her as he believes she is the key to the GuhaThakurta household.