On a hot summer day, the narrator was sitting under a tree by a cliff when the tree's roots broke, causing the cliff to collapse and the narrator to fall into a young river. The narrator tumbled downstream, passing through an old river, a hill, and a delta before befriending another rock named Grouchy Granite. Over time, the narrator eroded and became smaller, having adventures in rivers and eventually washing up on a sea shore and blowing inland on a hot day, where the cycle would repeat in a boring but cooling environment.