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

Colin Blaze is hired by a group of mermaids to investigate a string of missing pearls from their underwater kingdom. However, when Blaze tries to dive down to the kingdom, he discovers that the mermaids aren’t the only ones who want the pearls – there’s a rival group of sea creatures who are also after them, and they’re not afraid to get violent.

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.