Doctor Gulliver is poor, so nothing - not even his charming fiancée Elisabeth - keeps him in the town he lives. He signs on to a ship to India, but in a storm he's washed off the ship and ends up on an island, which is inhibitated by very tiny people. After he managed to convince them he's harmless and is accepted as one of their citizens, their king wants to use him in war against a people of giants. Compared to them, even Gulliver is a gnome.
The 3 Worlds of Gulliver is a 1960 American Eastmancolor fantasy adventure film loosely based upon the 1726 novel Gulliver's Travels by Jonathan Swift. The film stars Kerwin Mathews as the title character, June Thorburn as his fiancée Elizabeth, and child actress Sherry Alberoni as Glumdalclitch.