An engineer has discovered a new special alloy for the construction of submarines and is about to launch it on the world market. To force him to give up the formula, his opponents kidnap his son.
| Directing | Melchiade Coletti | Director |
| Writing | Melchiade Coletti | Story |
| Writing | Arnaldo Francolini | Story |
| Writing | Melchiade Coletti | Screenplay |
