In this musical comedy-drama from Cuban-born actor/director Rene Cardona, several couples are lured into becoming contestants in a dance marathon that awards a large cash prize to the last couple standing at the end of this grueling endurance test. They all hope to win, for different reasons: a bank employee and his wife has a sick child in need of the best care money can buy; a young couple hopes to use the money to start out in life together; a taxi-dancer and her man hope to leave their old lives behind once and for all. This film features an attractive cast and lively musical numbers, including a full mariachi band.