The second DLC campaign, Claptastic Voyage and Ultimate Vault Hunter Upgrade Pack 2, was released on 24 March 2015, coinciding with the release of The Handsome Collection. It features the player characters being sent into the mind of Claptrap by Handsome Jack to retrieve a mysterious piece of software known as the "H-Source", hidden within it by Hyperion's former CEO Harold Tassiter, resulting in the release of Shadowtrap, the digital manifestation of Claptrap's FR4G-TP program. The story also features the CL4P-TP genocide and a deeper look into Claptrap's depression. 2K Australia's creative director Jonathan Pelling cited Fantastic Voyage, Tron, and the holodeck of Star Trek as influences on the campaign, explaining that "We thought the best way to get to know Claptrap a little bit more was to actually go inside his mind and see what he thinks. To get those perspectives, recover those memories, and dig through his dirty laundry." The DLC also raises the character level cap to 70, and feature a customizable challenge arena.
Source: Wikipedia, "[en.wikipedia.org/wiki/Borderlands%3A_The_Pre-Sequel Borderlands: The Pre-Sequel]", available under the CC-BY-SA License.