The Daltons escaped once again and decided to go to Canada, hoping that Lucky Luke would not pick them up there! No matter what borders, Lucky Luke will see the country to get them back. Daltons' habits are the same as in the United States: bank robberies and attacks are on the rendezvous, but Lucky Luke, assisted by the very British Corporal Pendergast, will be able to bring them back to their Texas penitentiary.