Worf returns from the Bat'leth competition with a first place trophy. When he returns he walks into his quarters and is greeted with a surprise birthday party. While at the party Worf gets dizzy and notice things have changed before his eyes. It happens again in engineering. Worf gets dizzy and thing change again. This time Geordi and Data are at opposites sides of the room. Worf goes to sickbay to tell Dr. Krusher what is going on.
Krusher says he is suffering from memory loss. Worf asks for Data’s help to solve the mystery.