Although they could hardly be more different, Arthur (Michael Maertens) and Felix (Til Schweiger) are best friends, always have been, it seems - one a pedantic bourgeois, the other a sly one who lives in the fast lane. To help his burnt-out friend, Arthur lends him his medical card for a check-up at the hospital and learns that Felix is terminally ill. Because Arthur can't bring himself to tell Felix the truth straight out, Arthur gets so tangled up that eventually Felix thinks his best friend is dying! And so Felix begins to take care of the very healthy Arthur. In the end, Arthur gets to know life (anew) and Felix understands what it means to love.