Synopsis: Undercover lawman Gastón (Gastón Santos) comes to the García ranch wanting to know about an odd carved idol. The ranch and the nearby town have been deteriorating for a year, ever since the death of the lady matriarch. Young heir María Elena García (María Duval) is troubled by the morbid atmosphere. Her superstitious Aunt Clotilde (Carolina Barret), is convinced that the dead woman is La Lorona, or "weeping ghost" escaped from the crypt. Gastón and his sleepy sidekick Coyote Loco (Pedro D'Aguillón) accompany a doctor back to the ranch and slowly uncover the truth. Is a conspiracy afoot, or is La Llorona really rising from the dead to strangle unlucky victims?

A bloody victim collapses in the swamp (which looks rather parched to us) next to a scary skeletal corpse, as a screaming female voice howls, "My children!" The Living Coffin then devolves into a Mexican version of a Lone Ranger episode. Gastón Santos' buckskin garbed, white hatted 'amateur archeologist' wanders into a haunted house situation. After a number of ho-hum spooky events, he turns out to be (surprise!) a federal agent rooting out a murderous conspiracy. The García household is paralyzed by missing corpses, unexplainable killings and a haunted clock with a dagger stabbed into its dial. The beautiful, available young heiress frets, the ranch manager wishes that the old lady in charge would stop being so superstitious and our noble Gastón relies on a comic-relief pal in a coonskin cap to hold his horse. When the lawman is stuck in quicksand or needs help rousting the local bad guys, that trusty horse comes to his aid like Rin-Tin-Tin. In the film's silliest scene, the white stallion fires a gun by pulling a string, thus fooling the bumbling baddies into thinking that they're surrounded. I don't know of any 30s series westerns that were this infantile: Gastón returns from a soaking in the mud with a spotless leather outfit, and hurriedly explains that he 'spent all day washing his clothes in a brook.'

The Living Coffin's 10% horror content is interesting because the movie is in color, and is fairly careful with its lighting. A few setups use color accents that, if they were a bit more creative, might remind one of Mario Bava's work. Typical is the shot where a large wooden beam blots out the upper reaches of the frame, conveniently blocking our view of the top of the set and the lights peeking over it. La Llorona's initial appearances are actually quite effective, using spooky close-ups of a woman with a weird, dusty-looking facial texture.

The mystery of The Living Coffin resolves into a typical fake ghost gambit to cheat a family of its fortune, in this case, a gold mine. The movie has laughable shoot-outs and a risible saloon fistfight sequence, the kind where the stuntman reels backward from the hero's mighty blow, looks where he's going and then exerts himself to tumble 'out of control' over the bar. The film may not be scary, but it is occasionally funny.

According to David Wilt, star Gastón Santos was the playboy son of the governor of the Mexican state of San Luis Potosí. He was first a bullfighter and then seems to have gravitated to films as a lark. As an actor Santos is a complete wash. He exhibits only two facial choices (calm, distress) and approaches most scenes with an utter lack of expression. The energetic supporting cast can't do much, although Carolina Barret is effective as the frightened, superstitious Aunt. Pedro D'Aguillón's mildly likeable clown isn't going to attract any new fans; the music score makes room for 'wah-wah' type comedy stings when he pulls his 'zany' antics. That aspect of the picture is pretty painful.