Why do a sleazy antique dealer and a wealthy collector suddenly become interested in an unknown artist named Jo Allison? Is it the mysterious goblet she used in three still-life paintings? Jo's apartment is burglarized, and she is followed and threatened. When she attempts to determine the provenance of the goblet, she discovers that it might be a priceless artifact. Thieves follow her to Chicago and to the home of a blind woman in Riverside who also owns one of the goblets. The exciting climax takes place on the steps of the Art Institute of Chicago, between the roaring lions.
