Mirta is Cuban and lives in Madrid. As many others immigrants she works in cleaning industry. Today at six o'clock p.m. her daughter is going to marry. But nothing turns out as she hopes, and to reach this wedding is more difficult than it appeared at first sight.

Arturo is obsessed with cleanliness and order. This trait interferes with his normal life and raises problems with those around him, specially with his mother and bride. A doctor suggests he should make a treatment with gamma rays, in his private practice.