# Narrative Design Trigger
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Before proceeding with this section, it is advisable to familiarize yourself with the Narrative Design system, as elucidated in this [tutorial](https://youtu.be/C0JdmBTmZ9g?si=dImNu2-fBwKW1Frx).
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## Use of Invoke Narrative Design Trigger in Unreal Engine.
1. Develop the logical flow for your specific use case. In this instance, we have created a simple museum tour guide scenario.
1. Once the logic is decided we can move to Unreal Engine. (In this guide we will use the same setup described in this [guide](https://docs.convai.com/api-docs/plugins-and-integrations/unreal-engine/guides/event-aware-convai-characters))
2. Our goal is to invoke the trigger `Start Tour` in the narrative Design graph, using the `Invoke Narrative Design Trigger` .
3. The `Trigger Name` in the function should be the same as the `Trigger` name on the graph.
Website
Unreal Engine
3. The above example showcased only one Trigger. The use of more than one Trigger is also possible based on execution logic.
