A fox in the desert

Normally at age 25, a man has any prospect for the future. The protagonist of this story no. He is brutalized by the life he leads and everything seems futile, unnecessary and unhealthy. Receives an unexpected communication recruitment in the bank; reluctant, knowing his character, he starts to work, because even aware that a job in the bank is coveted by many of his peers. Can resist only a few days; gets sick and he takes a vacation in the near Sahara Desert.
There, a series of tragicomic adventures reduce him dying. He returned to work battered, he resists this time only one day ...