Caught in a violent thunderstorm a young goat, Mei, is separated from his friends and takes shelter in an old barn. A little later somebody else comes in the barn, but it's too dark to see who it is. Mei is scared and believing that it's another goat he starts talking to the stranger. But the stranger isn't a goat, it's a wolf! His name is Gabu and he thinks the stranger is a fellow wolf so they keep taking. By the time the storm ends they are friends and even agree to meet the next day in front of the barn for lunch. There secret password to recognize each other is "stormy night". When they meet face to face the next day they are both shocked, but the bond they built the night before is strong and over time their friendship becomes stronger and stronger.
It'd be cruel to tell you anymore. The story is filled with lots of cute moments, but it's also pretty serious. The animation is simple, but very beautiful and I thought it fit the story well. Very sweet film and it deserves a bigger audience (like maybe an official Blu-Ray release here in America) so I say check it out!