A man, living wild and naked among the tombs and possessed by demons, asks Jesus for help. The demons, fallen angels of Satan, ask Him not to be cast out "into the deep", but to be sent into a nearby herd of swine. According to the Gospel of Matthew 8:32, "He said unto them, Go. And when they were come out, they went into the herd of swine: and, behold, the whole herd of swine ran violently down a steep place into the sea, and perished in the waters".
The recovered man wishes to follow Jesus but is instructed by Him to tell others of what He has done.
Related in the Synoptic Gospels, Matthew mentions two possessed men, Luke and Mark refer to one man.