The Stranger and the Gunfighter

When Dakota (Lee Van Cleef) is found guilty for the death of a man who was killed in an explosion while breaking into Dakota's safe, he's sentenced to death by hanging. Back in China, Ho (Lo Lieh) is sent by the local warlord to the U.S. to reclaim the fortune that should have been made using the money that was sent over with the now dead man. Ho finds out that Dakota isn't guilty though, and frees him from the noose at the last minute, so that the 2 of them can solve the mystery. Ho reveals to Dakota that there are 4 clues that, when compiled, will tell them where to find it. One catch though - each piece of the puzzle is tattooed on a woman's rear. (official distributor synopsis)