A Klingon who offers to train Alexander proves to be Alexander's own future self, trying to change history.
Worf takes his son, Alexander, to a Klingon festival, where they are attacked, and Alexander shows little interest in the warrior ways. A mysterious visitor named K'mtar arrives and offers to teach the boy. He has a surprising connection to the family, and a hidden purpose.
The story offers a look at the future, and it explores the question of what it means to be a father and a son. The story is one of the better entries for Alexander, and it offers a significant development for Worf. It is a reflective story about legacy and expectation, with a surprise that ties into the larger story of Klingon history.