In the film, an ambitious house helper who wishes to become a successful person but her life becomes miserable when she is humiliated, abused, and maltreated by her evil employer.

Salvador M. Royales wrote a radio drama story that was serialized for DZRH, which he adapted into a screenplay with Emmanuel "Maning" Borlaza.

The film's theme song, performed by Dulce, was written by Amado Lacuesta Jr., and composed by Nonong Buencamino.

Florida, a servant at the Villarroel mansion, falls in love with Hector, the son of Doña Octavia, despite his marriage to Carol.

Overhearing this, Octavia and her servants Ariel and Nelia lock Florida inside her quarters while Hector does nothing.

At the same time, Florida gives birth while Hector is debilitated following a car crash engineered by disgruntled workers from Carol's estate.

Florida takes a job as a seamstress at a garment factory, where she perseveres and becomes the confidante of her boss Dorina.

The next day, Oliver announces his intent to marry Bernadette, sparking a confrontation with Florida, but gaining the tacit approval of Octavia.

As Florida gloats at having her revenge, Octavia reveals that Bernadette is actually her daughter and divulges the truth behind what happened.

[2] Film producer Charo Santos-Concio offered two projects to actor Julio Diaz for Vision Films: one for Kapag Langit ang Humatol and one for the Ronnie Ricketts starrer Ganti ng Api (then unnamed and upcoming when Diaz was offered the roles).