From their website:
Run for Your Life! (pdf, 5.9 MB) is bonus downloadable content for Cadwallon: City of Thieves that adds a new high-stakes timer to the game. Featuring new map tiles and locations along with the variant rules to use them, Run for Your Life! brings even more variety to nightly illicit activities (this variant requires The Inn, Cry Havoc!, and A Gamble in the Dark, which are each available on our support page).