In this wild comedy, an FBI agent named Malcolm Turner is determined to catch a crafty criminal who has just escaped from prison. To infiltrate the case, the clever Turner devises a ridiculous plan: he transforms into a lovable and hefty grandmother who goes by the name "Big Momma." With a complete disguise and a personality that overflows with charm, he temporarily moves into the home of the key witness's mother, where danger and hilarity await at every turn.
As he tries to keep his identity a secret, Turner faces hilarious and challenging situations, struggling to deal with family life and household dynamics, all while tracking the criminal's movements. Along the way, he develops an unexpected connection with the family members, especially with the young and attractive woman living in the house. Amidst misunderstandings and mix-ups, Turner starts to question his life and what really matters.
As things get complicated, Turner must use all his skills as an agent to unmask the criminal before it's too late, pushing the comedy to the limits. The film blends laughter, action, and a touch of heart, showing how sometimes the most absurd situations can lead to important discoveries about who you truly are. Get ready for an unforgettable story filled with laughter and touching moments.