A quick explanation

For the people who watched this series of Voltron, this takes place 3 years after allura's "death" btw.

With Zarkon, Hagar and Lotor gone from the galaxy, peace has returned to many peoples (and aliens) lives, but when an ancient threat, after years of sleep, returns, The witch queen: The queen of the Hive (I think) tends to take the galaxy for herself then move beyond to more galaxies, universes and realities (Hagar style ya know?) with her army of hive. But when there is evil, a hreo will arise, or heroes will arise in this case, these heroes deemed Guardians will defeat this evil and restore balance to the galaxy, or will they lose. Find out here.