The show begins with Morpheus isolated in captivity for over a hundred years until he manages to escape. Morpheus must rebuild his ruined kingdom, regain his objects, and retrieve nightmares. He interacts with mortals and immortals alike, and in prioritizing his job over everything else, Morpheus is often cold to those he considers allies and cruel to those who oppose him.
Writer Erasmus Fry captured the muse, Calliope, to use for ideas and success. He then handed her off to Richard Madoc, who enjoyed the same kind of success through nefarious deeds.
Calliope called to Morpheus, her ex-husband, who was sympathetic to her plight as a prisoner. As a result, Morpheus visited Madoc, who wouldn't free Calliope because he needed ideas. So, Morpheus gave him ideas in abundance, having them come at him so quickly that he was driven insane trying to write them all down. He went so far as to use his own blood when his pen ran out. Of course, whether he deserved this fate if up for debate, but it's certainly a gruesome punishment.