Zaf Williams is depressed.

After splitting up with his boyfriend Nicholas and promising his sister Connie he'd make a success of moving to London to study Art History, things have gone pear-shaped. Now he's forced to go back home to Birmingham with his tail between his legs.

In one last attempt to squeeze all he can from his time in London, he goes to the National Gallery, a place guaranteed to cheer him up.

But his trip isn't quite what he expected. Instead of seeing some art and boosting his spirits, he'll help solve a mystery, prevent a crime and make a new friend - a charismatic tour guide called Diana Bakewell.

Could this be the start of Zaf's new career?