The rain orchestra narrates the encounter and friendship between Sean, a Swiss writer who has just been abandoned by his wife, a lifelong companion, and Niahm, an Irish woman of humble origin who, after a painful journey through London and Berlin , Decides to return to its native town, Donegal. It is in this place where they both meet and form a great friendship, marked by the need to tell their own stories and hopes as a means of expelling pain and achieving tranquility in their lives. And this is how the months go by: watching movies, drinking tea, watching nature, listening to the music of the rain, watching the beautiful landscape of the Irish cliffs and, above all, talking, reopening and at the same time healing the Wounds of life, which become perpetual scars of the soul. In the end, both demonstrate that it is better to affirm life than to take refuge in the pain of memories and fantasies of being someone who is not, that things would have been different from what they were, are and will be: "I never wanted or I imagined another life, "says Niahm. Wanting another life means that you want to be someone else. That one would rather have had other experiences. I would have preferred to meet other people. He wants to know other things and not know them. And also that he wants to forget other things than those that one can not forget. And it's an unbearable idea ... I want to keep what I can not forget as long as I can, because it's finally what makes me. " This certainty will become, on the one hand, true ars moriendi, and, on the other, the possibility of a new beginning.