Hanni Pham is someone who enjoys robotics, and apart from that, robot fights. She likes to feel the adrenaline of each hit, even if she loses, although it has happened rarely. One night, after one such event, she meets Danielle, a girl who found out she was the sister of one of the boys she had beaten in a battle before, and who captivated her from the first moment.

When Hanni meets Danielle, she begins to see the girl more often outside her window, sitting on the highest branch of the tree in her neighbor's yard, with her eyes fixed on the night sky. Despite all the mysteries surrounding her, she can't help but become fond of Danielle's curious and spontaneous personality, capable of filling the entire night with anecdotes about her life and, above all, taking her to the moon.

In a world where the rain never stops, Danielle is a girl who is allergic to raindrops, and Hanni is someone who can barely get sick, even when spending hours underwater.