Cielo gets heartbroken when her boyfriend of 11 years dumps her just before their wedding and she also loses her job at that. She then isolates herself, wallowing in sadness. Soon, she gets some anonymous hand-illustrated postcards from various parts of the Philippines, along with some love poems, from a secret admirer called M.
She then decides to go on a journey to visit the places in the postcards, using some clues in it, in the hope of discovering the identity of the mysterious M, making “Sakaling Hindi Makarating” a road movie. Among the places she visited are Zamboanga, Siquijor, Marinduque, Batanes and the Ilocos region.
In the course of her journey, it becomes clear that Cielo is also trying to find herself and getting to love herself more. She meets other colorful characters along the way that allow her to let go of the past and help brighten up her life.