The emissary

To find pearls, a fisher man goes to the sea on a cursed ship. But the ship seamen leave him in an island and go. 15 years later he finally returns home, where his 15-year-old son, provoked by the diamond smugglers, wants to kill him.

The Invisible Trap, directed by Fariborz Saleh, is a lesser-known film that was produced in the final year of the second Pahlavi government at the behest of the SAVAK.