Mobile Suit Gundam Unicorn

A Neo Zeon remnant group called the "Sleeves" travels to Side 4's Industrial 7 colony, so that its captain, Zinnerman, can receive a "key" to something known as "Laplace's Box" from Vist Foundation leader Cardeas Vist. The item is said to be capable of either restoring the future or destroying the world. Audrey Burns seeks to meet Vist first and convince him not to turn over Laplace's Box, believing the Sleeves will use it to start another war. Along the way, she is rescued by 16-year-old student Banagher Links, who agrees to take her to Vist. Meanwhile, a battle breaks out between the Federation's Londo Bell taskforce and the Sleeves. As the collateral damage rises, the colony is evacuated. Amidst the chaos, Banagher discovers the fatally-wounded Cardeas Vist in the cockpit of the Unicorn Gundam. Before his death, Vist entrusts the Gundam to Banagher, who realizes that Vist is his father. Banagher then launches in the Unicorn and confronts the Sleeves' elite pilot, Marida Cruz, who is piloting the Kshatriya.

The transformed Unicorn Gundam overpowers the Kshatriya and Marida is ordered to retreat. The Unicorn is picked up by the Londo Bell ship Nahel Argama. Banagher is questioned by Daguza Mackle about how he came to possess the Unicorn Gundam but is interrupted by the Sleeves' surprise attack. Full Frontal, the leader of Neo Zeon, demands that the Nahel Argama hand over any items related to Laplace's Box, including the Unicorn. Daguza tries to ensure safe passage by holding Audrey, revealed to be Zeon Princess Mineva Lao Zabi, hostage, but Frontal refuses to accept they have the real Mineva. With no other choice, Banagher sorties in the Unicorn against the Sinanju; he fights well, but is captured when blindsided by the Kshatriya. Banagher is taken to meet Frontal at the Sleeves asteroid base of Palau.

After discussing the nature of Zeon with Marida, who is placed in charge of watching over Banagher, a crew member from Nahel Argama disguised as a bum bumps into Banagher and passes him a map and a transmitter, telling him to get to the 14th space gate or risk being killed in the coming battle. Banagher laments over how the colony will become a battlefield soon.

The Earth Federation and ECOAS execute their assault on Palau, with the intention of rescuing Banagher and the Unicorn. Saboteurs destroy Palau's connecting bridges, while the Nahel Argama unleashes its Hyper-Mega Particle Cannon, pushing the asteroids towards each other to damage much of the Sleeves' forces. Any Sleeves unit getting out is ambushed by ECOAS units hiding in the rocks. Riddhe springs Audrey from detention so they can go to Earth and talk to his father, Ronan, but not before trying to convince a surprised Micott about their intentions. Banagher finds the Unicorn Gundam and tries to escape, defeating Marida in the process. She is eventually captured and Alberto Vist is allowed to escort her to an Anaheim Electronics facility on Earth.

Banagher and Daguza proceed to the remains of Laplace with the intention of activating Laplace's Box, but hear the original broadcast of the Earth Federation establishment ceremony. The Sleeves are not far behind and the EFSF/ECOAS units fight them. The Sinanju appears and Daguza sacrifices his life to buy Banagher some time to activate the Unicorn's Destroy mode. The fight sheds parts of the Laplace colony and sends them into the atmosphere. Banagher continues to pursue Full Frontal during the reentry, but a beam magnum shot meant for the Sinanju hits Gilboa Sant instead. As Banagher and the Nahel Argama enter the atmosphere, Audrey arrives at the Marcenas estate.

Episode 3's insert song is "Ego" by Mika Kobayashi

The Zeon Remnant forces attack the Federation Capitol Building at Dakar in a feint operation to allow the Garencieres to descend to Earth safely. Banagher is revealed to have been rescued from death by the Garencieres crew mid-descent. Marida is transported to a Federation facility in North America, where Martha Vist Carbine manipulates her using the wreck of an old Mass Production Qubeley, which she had piloted in the past. Audrey is held at the Marcenas estate. Riddhe escapes after his father, Ronan, tells him the truth about Laplace's Box. Audrey briefly escapes captivity long enough to have a insightful conversation with an old man in a local diner, which strengthens her resolve. Bright Noa is ordered to take Riddhe on board the Ra Cailum under his command, as well as capture the Garencieres.

After being called in from around the world, the Zeon Remnant forces band together and assault Torrington base en masse. The Shamblo's pilot, Loni Garvey, falls victim to the malfunctioning on-board psycommu system, becoming a channel for her dead father's bloodlust and begins indiscriminately massacring the population of a local city, despite being ordered to avoid causing collateral damage. Banagher, appalled by the resulting destruction, confronts Zinnerman about his hypocritical rationaling of the situation and flies out in the Unicorn Gundam to put a stop to Loni's rampage. After failing to reason with her, he activates the NT-D in a last ditch effort to stop her without resorting to lethal force. Incensed by Banagher's refusal to kill Loni, Riddhe decides to kill her himself, much to Banagher's dismay, and orders Banagher at gunpoint to hand over the Unicorn Gundam according to Captain Bright's orders. As he threatens Banagher, the two witness a mysterious black-colored Unicorn Gundam being dropped into the battlefield.