A young unicorn named May seeks shelter into a abandoned cottage from a storm. In the cottage, May meets a dark-figured stranger. The two can neither see or smell each other, but nevertheless they begins to talk, trying to ignore the cold and the terrifying stormy night. Eventually, they develops a friendship and the two decides to meet later and will recognizes each other by using the password "One Stormy Night".
The next day, when they meet, May learns that her companion from the night before was a peculier-looking draconequus named Anubis. Despite their natural disposition as prey and predator, and Anubis´ unknown existence, they shared a common bond and began meeting regularly. However, the civilization of Ponyville and a wolf pack found out about their secretive friendship and forbid them to see each other.

Will they ever find a way to escape this chaos and continues to live their everlasting friendship in peace?

*This story was inspired by Arashi No Yoru Ni(One Stormy Night). My farvorite anime.*