What is the fine-grained topic of the following text: When Myder joined Skelly, Kanan Jarrus, and Hera Syndulla on a mission to stop Count Denetrius Vidian's plan to destroy Cynda, she was able to slice into surveillance and communications systems and carried devices that helped her do so. Only return the topic.
Myder's involvement in a mission to stop Count Denetrius Vidian's plan to destroy Cynda