Jason Priestley (not that one) has just seen her. They shared an incredible, brief, fleeting moment of deep possibility, somewhere halfway down Charlotte Street.

And then, just like that, she was gone - accidentally leaving him holding her old-fashioned, disposable camera, chock full of undeveloped photos...

And now Jason - ex-teacher, ex-boyfriend, part-time writer and reluctant hero - faces a dilemma. Should he try and track The Girl down? What if she's The One? But that would mean using the only clues he has, which lie untouched in this tatty disposable...

It's funny how things can develop...