Premise
Madcap.
Adjective and Noun meaning amusingly eccentric, zany, eccentric, ridiculous, unconventional, weird, madman/madwoman, maniac, lunatic, psychotic, oddity, hothead, daredevil, crackpot, loony, nutjob, cuckoo, dingbat, wackadoodle... You get the picture.
Once upon a time, there were...