I fed ChatGPT some Colin Blaze prompts and challenged it to come up with some more. This is one that I thought had potential.

Blaze is hired by a group of ghosts who are haunted by an even more malevolent spirit. As Blaze tries to track down the spirit, he discovers that it’s tied to a tragic event from his own past – and that he may be the only one who can put the spirit to rest.

Colin Blaze is a (possibly private) detective cursed by a witch to have only cases that no right-thinking person would ever believe were real. The witch hoped that Blaze would be discredited and forced to quit. Instead, Blaze is the champion of the bizarre and marginalised oddities of London.