Separated when they were nineteen but forever tethered to hope, two Argentinian lovers, manage to stay in touch even as the world pulls them further and further apart. Persuasive messages, some of which take months to reach their recipient, dramatically alter the course of each of their lives but the time that passes between communications has a way of unraveling even the best-laid plans. Aboard a transatlantic flight many years later, the two are serendipitously united but the repercussions of this much-anticipated convergence could have global consequences.