Indiana Jones returns again, and again this time, to save the world from the Nazis. In this film, the Nazis have kidnapped Indy's father, Professor Henry Jones, for his diary, which contains maps and first-hand accounts of many of the world's most sacred and hidden items. One of these such items, the Holy Grail, is what the Nazis are after, and is the reason they had kidnapped Prof. Jones and his diary. Indy must then make his way directly into the "lion's den" - Nazi Germany - in order to save his father, his diary, and the Holy Grail - all from the Nazis.