The story of an ordinary woman who gets to lead an extraordinary life as the nanny of the children of a widower Philippine Vice-President who eventually becomes the President by accession and election.

Melody is the nanny to the children of the country's Vice President, widower Glenn Acosta. Her sincere and kind nature helps her bridge the gap between Glenn and his children, who feel that their father's busy schedule causes him to neglect them. The children warm up to Melody, and so does Glenn. He realizes how Melody sincerely cares for his children. Romantic feelings soon arise between Melody and Glenn. Things take an unexpected turn when the incumbent President suddenly dies and Glenn becomes the president. Soon, the public begins to notice Melody's presence in the President's life, and people start calling her the "First Nanny." As Glenn's new role in the government becomes more demanding, he finds himself relying more on Melody. In turn, Melody becomes involved in Glenn's work, including matters that could put the President's political career--and his life--in danger.