does anyone know this one movie...

im sorry to ask on this board but i wanted to know if anyone knows of the movie im talking about.

i wish i could remember the name of the movie but it was about a young monk who comes back to the regular world and has a hhard time adjusting. I think he was taking care of his younger cousin. i also remember there was this female character who is in love with a terrorist.

i think the opening scene was a train car blowing up. this is a thai movie by the way.

any help would be appreciated