When a famous tango dancer drops dead of an apparent heart attack in the middle of a performance, tango instructor and chronic meddler Antonia "Ant" Blakely doesn't trust the police to get to the bottom of the case. Convinced the man died of a cocaine overdose and annoyed that no one cares what she thinks, she starts investigating on her own. Unfortunately, her sleuthing uncovers that things are not as they appear. There is a killer in the ballroom amidst her friends and acquaintances, and Antonia must stage a theatrical performance of her own to solve the crime before it's too late.