Grace Dalfinch is a talented violinist who longs to play contemporary music in bars, but her mum forbids her. James Crux is an aspiring street artist who promised his dad he wouldn't paint in public until he's finished school. When Crux witnesses Grace's impromptu performance on a deserted tram, he's inspired to paint her and her violin; and when Grace stumbles across her portrait in a Melbourne alley by an anonymous street artist, she sets out to find its creator.