A 12 year-old boy, Kelvin, goes missing from a tour group and the tour guide, Lynn, is forced to help search for him. She meets Sean, an officer of the Special Investigations Section (SIS) branch of the CID in Singapore, who is also in Bangkok conducting his own missing person’s search. Their collective path’s cross with Aut, a high-flying Thai police officer, when Lynn fingers Sean as a kidnapper and gets him arrested.