Sumio Mondo is a "Searcher" and makes his living finding people's lost things. After arriving at the Flower, Sun, and Rain Hotel on Lospass Island, Mondo takes a job to detect and defuse a bomb at the local airport. But will he make it on time?

Flower, Sun, and Rain is a mystery adventure where the player must solve challenging puzzles to help the residents of Lospass and attempt to unravel the secrets of the island. During his investigations, Mondo will meet various characters, including several from the mystery game, The Silver Case.