As the police race to track down suspects in a high-profile murder case, the mysterious death proves to be just the beginning in a series of dark revelations waiting to be uncovered in Dalah: Death and the Flowers. The series follows Dalah (Yaya-Urassaya Sperbund), a stylish floral designer hired to handle flower arrangements for the highly anticipated wedding of Ohm (Na-Naphat Vikairungroj), the leading candidate for Prime Minister, and his bride-to-be Risa (Pat-Chayanit Chansangavej). When the groom is found dead on his wedding day, everyone becomes prime suspects in the murder investigation. Entangled in a web of secret affairs and high-society scandals, Dalah decides to sleuth her way to the truth, unraveling dark secrets and a conspiracy that reaches into her past.

In a shocking turn of events, rising political star Ohm-Anusorn Uathepa, the promising future Prime Minister, was found dead among his own wedding floral arrangements at a renowned florist's studio. The young politician from the For Thai Society Party, who had been making waves with his feminist campaign promoting social equality, was widely tipped to become Thailand's next Prime Minister. Known for his exceptional capabilities and striking looks, Ohm was set to marry Risa-Narisa Tangsinsup, an heiress from one of the wealthiest families in Thailand. Their upcoming nuptials had captured national attention as it was to have united two of the country's most prominent dynasties.