A narrative frame 

A narrative frame, also known as a framing device or frame story, is a literary technique where a secondary story serves as the framework within which the main story is told. The frame story usually provides context, sets the scene, or offers commentary on the main narrative. Here's how a narrative frame works and its effect on storytelling:

Introduction and Context: The frame story typically serves as an introduction to the main narrative, providing context, background information, or setting the scene for the primary story. It may establish the setting, introduce characters, or present a thematic framework that connects to the main narrative.

Structural Framework: The frame story acts as a structural framework within which the main narrative unfolds. It establishes a narrative structure that organizes and frames the primary storyline, providing a cohesive framework for the overall narrative.

Enhancement of Themes and Motifs: The frame story can enhance the themes and motifs of the main narrative by providing a parallel or contrasting storyline that complements or contrasts with the primary story. It may explore similar themes, offer different perspectives, or provide context that enriches the reader's understanding of the main narrative.

Narrative Perspective: The frame story can also serve as a narrative perspective through which the main story is filtered. It may be narrated by a character within the main narrative, an outside observer, or an omniscient narrator, offering insights, commentary, or reflections on the events of the main story.

Engagement and Immersion: A well-crafted frame story can engage readers and draw them into the narrative by providing a compelling entry point into the main story. It can create intrigue, suspense, or curiosity, enticing readers to explore the main narrative within the context established by the frame story.

Closure and Resolution: In some cases, the frame story may also provide closure or resolution to the main narrative. It may bookend the main story, offering a conclusion, reflection, or commentary that brings the narrative full circle and ties up loose ends.

Overall, a narrative frame adds depth, complexity, and resonance to storytelling by providing a structural framework, enhancing themes and motifs, offering narrative perspective, engaging readers, and providing closure or resolution to the narrative.