The main plot is that RIck's ship's microverse battery is completely discharged. But when he leaves Summer alone with the ship and instructs it to keep her safe, it uses lasers, robotic arms, and other devices that somehow work even though the battery is drained.
When Rick visits his micro-verse and when Zeep visits his mini-verse, they don costumes to look alien to their respective universes' inhabitants. Yet both Rick and Zeep look different enough from the inhabitants to pass as aliens without costumes.