"We interrupt this program to bring you — Courage, the Cowardly Dog Show, starring COURAGE, the COWARDLY DOOOOG.
Abandoned as a pup, he was found by Muriel, who lives in the middle of Nowhere, with her husband, Eustace Bagge.
But creeeeepy stuff happens in Nowhere, and it's up to Courage to save his new home!"
Courage's world is a world where supernatural wackiness happens frequently, and most of it follows Courage around like a plague! Zombies, robots, aliens, mummies, demons, and other strange and spooky creatures and villains all harass the poor dog just because he happens to be there, and still do, even now.
But Courage's family, Muriel and Eustace, died of old age a year or two back… As opposed to the horrible fates that would've befallen them if Courage was not around.