Two angels, Damiel and Cassiel, glide through the streets of Berlin, observing the bustling population, providing invisible rays of hope to the distressed but never interacting with them. When Damiel falls in love with lonely trapeze artist Marion, the angel longs to experience life in the physical world, and finds -- with some words of wisdom from actor Peter Falk -- that it might be possible for him to take human form.

Raimund Gregorius, having saved a beautiful Portuguese woman from leaping to her death, stumbles upon a mesmerizing book by a Portuguese author, which compels him to suddenly abandon the boring life he has led for years and to embark on an enthralling adventure. In search of the author, Gregorius acts as detective, pulling together pieces of a puzzle that involves political and emotional intrigue and the highest possible stakes. His voyage is one that transcends time and space, delving into the realms of history, medicine and love, all in search of true meaning to his life.