A young linguist named Milo Thatch joins an intrepid group of explorers to find the mysterious lost continent of Atlantis.

At the Louvre museum in Paris, the phantom Belphegor awakens and causes electrical havoc. Night guards at the museum start dying, Lisa gets possessed, and Martin tries to help her.

When Robert Langdon wakes up in an Italian hospital with amnesia, he teams up with Dr. Sienna Brooks, and together they must race across Europe against the clock to foil a deadly global plot.