Dink, Josh, and Ruth Rose are on February vacation site-seeing in San Francisco. Their tour guide Holden shows them all around Chinatown and the even get to meet Miss Chinatown-Lily, who is Holden's girlfriend. But something happens and Lily goes missing along with the valuable crown she wears. When the police think that Holden is the culprit, the kids are determined to figure out who really did this.
