The Balloon Stories!

A man digs a garden and uncovers a long-buried metal box. When he opens the box he finds six envelopes, each with a different name. He also sees other intriguing items in there, including the remains of a green balloon, a sea shell, and bones from two human fingers. He decides to deliver the envelopes and answer his questions about that box and its contents. He finds answers that touch a lot of lives, including his own.