JC works as a prison guard and lives a fairly uneventful life, with the exception of his passion for tango. An evening on the dance course, he meets newcomer Alice, a 30 year old mother to a beaming teenager. The day after, they meet again, but this time in the visiting room of the prison in which JC is working. She has come to greet two of the inmates, one of them is her husband and the other her lover. The prison's rules are clear on the point that you never socialize with inmates or their families, but JC can not resist helping Alice and is now forced to go against all the rules that previously defined his life.