When the fun of double dating begins to grow old, Richard and Bettina share a dirty little secret with their friends Diego and Emilia: They live a double life as swingers, and would love to share this practice with them.

Film in two cities divided by one river: Buenos Aires, Montevideo. Two cities divided by one story: the death of Francisco. One death divided in two parts: an investigation, an escape.

When Martín and Sol try to solve the enigma of a missing neighbor, they will discover that nothing is what it seems, that your hearing can trick you just like your imagination and that your heart is a double-edged weapon.