The human body is adaptable, resilient, and astonishingly capable — truly a "high-performance machine". Humans have always sought to test their limits. But how resilient are we really? This film explores the tension between our bodies' impressive capabilities, and the moments when they clearly say 'enough is enough.' How resilient is the human body really? Where are its limits, and what happens when we cross them? In his youth, Stefan Santifaller tested his physical capabilities so hard as a competitive athlete that he became seriously ill. Pushing physical limits can very quickly push a person to their mental limits as well. When that happened to Stefan Santifaller, it forced him to reorient his life. Even in everyday life, we can reach our mental limits—whether due to worries in our personal lives or at work. When this type of overload happens, the body sends out signals, or "warning signs." Those affected often feel nervous, restless, depressed, tired, or weak.