This is an expansion and requires the base game to play: Yes

Argent: Summer Break is a tiny 20-card mini-expansion that adds a new voter, new supporters, new vault cards, and a new summer break scenario to the game. These have a much more lighthearted tone, such as a yacht you can use to bribe Consortium Voters, some enchanted beach gear, and more.

The expansion is included as a free reward to Kickstarter backers of Argent: The Consortium and will be available separately.