Tracking website and E-commerce Website Project Plan Development Document creation

I need a comprehensive project plan for a website. The plan should detail the website's concept, functionality, and development roadmap. It should include a clear explanation of the website's purpose and functionality, a detailed project roadmap covering design, development, content creation, site architecture, and user interaction, as well as design specifications.

- The plan should be communicated both visually and textually
- It should serve as a comprehensive guide for eventual developers

This task requires skills in project management, website development understanding, graphical presentation, and clear communication. Experience in developing plans for websites is a plus.