The iconic “gentleman thief” Lupin III returns in an action-packed, continent-spanning adventure, as Lupin III and his colorful underworld companions race to uncover the secrets of the mysterious Bresson Diary, before it falls into the hands of a dark cabal that will stop at nothing to resurrect the Third Reich.

U.C. 0097, one year after the opening of "Laplace's Box". Despite the revelation of the Universal Century Charter that acknowledges the existence and rights of Newtypes, the framework of the world has not been greatly altered. The conflict later dubbed the "Laplace Incident" is thought to have ended with the downfall of the Neo Zeon remnants known as the Sleeves. In its final battle, two full psycho-frame mobile suits displayed power beyond human understanding. The white unicorn and the black lion were sealed away to remove this danger from people's consciousness, and they should now be completely forgotten. However, the RX-0 Unicorn Gundam 03, which disappeared two years earlier, is now about to show itself in the Earth Sphere once more. A golden phoenix… named Phenex.

For hundreds of years, holiday genies have united to bring Christmas magic to the children of the world. However, this year a selfish ex-genie is determined to become the all-powerful Christmas Genie by stealing all the magic for himself. Now, it is up to a smart but reclusive elf to stop his evil plan and save Christmas for everyone.