It looks like "Kohlsson rar" might be a typo or a specific reference that isn't pulling up a standard "story." Based on common digital contexts, it's possible you're referring to one of these:
Since "rar" usually refers to a data file, here is a quick "useful" story (parable) about the nature of hidden information: Kohlsson rar
To help me give you the story you need, could you clarify: Did you find this name in a video game or movie ? Is it a person’s name from a specific book or history? Is "rar" a typo for something else, like "rare" or "raw" ? It looks like "Kohlsson rar" might be a
A traveler named Kohlsson once carried a heavy, iron-bound chest across the mountains. He told everyone it contained his greatest treasure. Thieves tried to pick the lock, but failed. Kings offered him land for its contents, but he refused. Years later, on his deathbed, his daughter finally opened the box using a simple brass key. Inside was not gold, but a collection of seeds and a map of where to plant them. The "treasure" wasn't the box itself, but the life that would grow once it was finally opened. A traveler named Kohlsson once carried a heavy,