The episode is taken from the book "The Oxford Handbook of Cognitive Psychology", which explores the workings of the human mind. The excerpt focuses on memory and the processes of retrieving stored information, such as remembering facts, events and knowledge. The author, Daniel Reisberg, uses the metaphor of a "storehouse" of memories to illustrate how information is organized and accessed, and discusses how memory is affected by different factors, including context, mood and emotion. The central idea is that memory is not a passive process, but rather a dynamic construction, influenced by various elements that interfere in our perception of reality and in the way we remember the past.