When men start getting assasinated in Mexico city in strange circumstances and no clear motive after an anonym note informing them of the date of their death, a friend of Santo, the silver masked (Santo El enmascarado de Plata) comes to the mexican wrestler, who dedicates his spare time to fight against criminals, for help fearing for his life as he has also received an anonym threatening his life announcing the date of his death in the very same way a previous victim was murdered. The mystery unfolds in a movie seasoned with mexican lucha libre, detectivesque intrigue and hand to hand fights.