Bangkok Love Story (2007)

Steamy Thai nights provide the backdrop for unbridled romance, crime and action as two men unexpectedly brave forbidden love. Maek, a cold assassin-for-hire, is sent to knock off Iht, a police informant, when in a twist of fate the killer is shot for refusing to pull the trigger. After making their escape, an indelible bond is forged when the vulnerable assassin is nursed back to health by handsome, married Iht. But as taboo feelings of desire swell between the swarthy new lovers, their relationship is discovered. Now there's no turning back as enemies, friends and lovers are pitted against each other.

Source: TMDb