'Kapag Nahati Ang Puso' follows the story of Rio and Claire who unwittingly become fierce rivals without knowing their real relationship as mother and daughter.

Rio Matias is a simple island beauty who meets the rich and happy-go-lucky Manila tourist Nico Del Valle. She got smitten with Nico’s charming personality and they eventually fall in love with each other.

However, their relationship is thwarted by Miranda Aseron, Nico’s ex-girlfriend when they were younger. A turn of events causes Rio to lose her family while Nico ends up taking care of their daughter Claire.

Years later, Claire grows up without knowing her real parents. Meanwhile, a now successful Rio returns to the Philippines. The unsuspecting mother and daughter cross paths, and both end up falling in love with Joaquin Espiritu. This and Miranda’s jealousy threaten to destroy the lives of Claire and Rio once and for all.

'Kapag Nahati Ang Puso' is under the helm of Gil Tejada, Jr.