After a robbery goes wrong, teenagers Thum and Bas flee from police and find themselves in Dan Sai, a small town in Loei province where the locals are celebrating the masked procession Phi Ta Khon. It's a time when spirits are free to walk amongst the living.After a robbery goes wrong, teenagers Thum and Bas flee from police and find themselves in Dan Sai, a small town in Loei province where the locals are celebrating the masked procession Phi Ta Khon. It's a time when spirits are free to walk amongst the living.