You lose something. And only then you appreciate it. John Perkins has a peaceful and lovely life with his wife Katy. They live in a seeming harmony. However things turn upside down when one evening John comes home only to find it empty. Why is Katy gone? What has happened? John realizes how many important things he has lost, the most important of all – his precious Katy. Only if she could come back. Everything would be different and John would value her so much more. But will he actually? "The Pendulum" swings back and forth. It is up to John to grab the moment and appreciate it. Because some things cannot be reversed and only the regret is left. William Sidney Porter (1862-1919), known simply as O. Henry, was a prolific American author of humorous literary pieces. His fame came exceptionally quickly and he became a bestselling author of short story collections, among the most famous being "Cabbages and Kings", "The Voice of the City", and "Strictly Business." As a result of the outstanding literature legacy that O. Henry left behind, there is an American annual award after his name, given to exceptional short stories.