The article provides a detailed guide on building a minimal REST-based application using Node.js and Express to retrieve documents from Couchbase, aimed at readers with a basic understanding of JavaScript, Node.js, and NoSQL databases. It builds on previous tutorials in the series, explaining how to set up an Express server that listens on port 3000 and handles HTTP requests to retrieve specific documents using a document ID. The process involves installing the Express module, setting up a route for data retrieval, and connecting to a Couchbase database, with functions to manage asynchronous operations and retrieve documents from a specified bucket and collection. The author also suggests future enhancements such as error capturing and authentication systems, and provides links to previous posts in the series for additional learning.