Through a series of secret agreements, the great German philosopher Friedrich Nietzsche and the Austrian doctor Josef Breuer, one of the fathers of psychoanalysis, meet in 19th-century Vienna, in an inspired process of dual psychotherapy.

In this adventure of existential searching, two unique individuals are involved: a young resident doctor named Sigmund Freud, a stormy woman idolized by poets and psychiatrists, Lou Salomé, and a captivating patient, Anna O., who haunts her doctor's soul.

The famous psychiatrist Irvin D. Yalom invents in this novel the encounter of two historical figures in the metropolis of intellectual ferment of the 19th century, Vienna, providing an interpretative version of the birth of psychotherapy and its relationship with existential philosophy.

The therapeutic adventure that unfolds is breathtaking as it reveals step by step the healing power of true connection.