Calpuina is a night-watchman in a wharehouse, a perfect job for him. When some thieves break in and steal some crates, El Santo is after them because they are using the wharehouse for diamond smuggling. Capulina hinders their capture. Then he decides that he will put on a wrestler's mask and help El Santo to caputre the crooks.

A new adventure of secret agent Alex Dynamo on land, in the air, and in the treacherous swamps. Alex Dynamo goes up against the S.O.S. organization, a sinister group of beautiful girls driven by a lust for blood.

Secret Organizational Service (S.O.S.) is an international crime syndicate, quite successful with their feminine agents operating under the guise of a fashion model agency led by Lady Bristol and her associate Luigi. The International Service is the governmental secret service decided to put a term to SOS's action. An agent has infiltrated SOS - but she is in danger, after sending a coded message to her supervising Inspector. So, agents Alex Dinamo is to join forces with Adriana, and give the undercover agent a hand.