The description pretty much states what you get, so I'll fill in more details with a review of the adventure and the format of the PDF.
The adventure is a three-act multi-session adventure for 3-5 first level characters. Each act is unique. The first takes place on a zepplin, involving the characters daringly saving the passengers and crew from a hijacking. The next find the characters lost on a settled island, slowly sinking into fear and despair. The last brings the characters to a climactic conclusion, in which they must release a Lady of Nightmares to defeat not one, but two, Between Worlds Beings. Quite a bit for first level, eh? The adventure has a healthy dose of combat, investigating, and interactions with colorful NPCs unique to the Anima universe. While the plots of the acts aren't too far from your typical FRPG adventure, the NPCs are definitely of the romance and villainy of Final Fantasy and similar computer RPGs.
The PDF is in beautiful color, and is best for iPad and color laser printer output. I do wish that a printer-friendly version of the book was included. Some of the rich color art becomes too dark in greyscale. And, of course, much of the eye-candy that impresses in a publisher-printed book becomes a source of ink and toner consumption when printed by the purchaser. The PDF comes with a four-panel reference screen that I had trouble printing on four separate sheets. That being said, a major advantage of printing out the PDF as individual sheets is that the game master can let the players access the first half of the book (new rules and new options) while keeping the rest of the book (the twenty pregenerated first-level characters and the adventure) to himself.
So if you're an iPad owner who's considering this supplement, you're definitely better off buying the PDF than the book. Others will have to judge how much the aesthetics of a beautifully published book from the publisher matters against the half price of the PDF.