His father sends him his diary which contains clues to the various deadly tests that is sure to come. He follows the clues and eventually ends up being captured and set to get the grail by the Nazi’s as he tries to save his father’s life who was shot and is dying as he sets out to retrieve the artifact. He goes through the usual tests (stunts and mind bogglers, the whole deal that tries to kill you every step of the way) to get to the grail, eventually facing the last Templar (knight protector from the Crusades) who is the last of the three who has been cursed to protect the Grail for eternity till the true and faithful claims it again from the bowels of the vault.
He gets the grail (choosing it from a wide array of gold and precious stone laden ones) looking back at the known profession and trait of Jesus as a carpenter. He selects a wooden cup, fills it with water and drinks (he succeeds and cheats death which was sure to follow a wrong selection) He then rushes back to his father’s side as the roof starts to fall (well it’s actually a cave of sorts somewhere deep) as the grail is taken beyond the seal of eternity which protects it from the sins of the outside world.
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