Mobile Suit Gundam Unicorn is a six-part OVA series which is based on a series of novels of the same name. The series begins in U.C. 0001, at the very beginning of human space colonization, when a space colony called Laplace is destroyed. The main story takes place in UC 0096, three years after the events of Mobile Suit Gundam: Char's Counterattack and 27 years before Gundam F91.
The story revolves around Banagher Links, a seemingly normal boy living and going to school in the space colonies. His life changes one day when he meets a girl named Audrey Burne, as the encounter brings him into contact with a new Gundam and its connections to an item called "Laplace's Box."
Based on the title, it seems that the fourth episode will cover the events that happened in the sixth volume of the novel. It is not sure if it will also cover the events that happened in the seventh volume, Black Unicorn.
Gundam Unicorn 3 | Gundam Unicorn 2 | Gundam Unicorn 1