Following the teams reformation after the corrupted wormhole, Shiro is in a recovery pod and vividly dreams the day he escaped- Galra scientist Ulaz releases Shiro, instructs him to get back to Earth and find Voltron. Shiro also expresses that not all Galra are evil as a Galra (Zarkon) was the privious Black Paladin of Voltron. Finding space coordinates in Shiro's artificial arm, the Paladins find Ulaz, who reveals he is part of an order known as the Blade of Marmora who are hidden within many ranks of Zarkon's Empire. Praxas, who is remade into a Ro-Beast, finds the Paladins and quickly gains the upperhand, until Ulaz sacrifices himself to destroy the monster and let Voltron find the HQ of the Blade of Marmora. Shiro and the group decide to wait until they learn how Zarkon is beginning to track them. In his room, Keith holds a small dagger he has had since childhood which bares the crest of Marmora.
For millennia, the evil Galra Empire has plagued the universe by conquering planets and destroying their inhabitants. The only known threat to the empire's power and plans, is the legendary "Defender of the Universe" Voltron, a 100 meter tall robot warrior composed of five lion mechas whose whereabouts are presumed to be unknown. The Galra Empire's path of conquest and search for Voltron has led them to Earth's solar system. A group of space pilots-Shiro, Keith, Lance, Pidge, and Hunk-discover the blue lion and immediately get swept up into the Galran War. They meet Princess Allura, become the next Paladins, and reunite the five lions to form Voltron and free the universe from the Galra Empire.
**NOTE: Even though Netflix releases all episodes of Voltron: Legendary Defender on one day, they are portrayed on the TV Calendar as airing one episode a day, for ease of visualisation.
Voltron: Legendary Defender - Shiro's Escape Synopsis and Schedule