The mighty Subjugator-class heavy cruiser Malevolence is en route to destroy a fleet of evil Venator-class Star Destroyers in the Ryndellia system. The mission is interrupted by someone onboard the Subjugator cruiser. That someone is Indigo Zap, but she's not alone--Starlight Glimmer, hoping to boost the reputation of Our Town, has joined her in sabotaging the ship. Once Grievous realizes that the Malevolence is set on a collision course to the Dead Moon of Antar, Grievous tries to change the hyperdrive...but it may already be too late...

Timelines:

Star Wars: The Clone Wars: After "Rising Malevolence", right before the first spacebattle in "Shadow of Malevolence".

MLP: Right before the Mane 6 discover Our Town.

EQG: Right before the Friendship Games.