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During the earthquake, Lucky manages to escape alive from a collapsed dog shelter and becomes a free stray dog again. In the ruined and devastated city, he meets former pet dogs who were abandoned by their owners and condemned to die without food and shelter. The lucky man tries to teach them how to survive in the new world and awaken their canine spirit. But to do this, they have to become a pack, forget about their loyalty to people and flee the dangerous city.

The Pack series was created by British writers under the pseudonym Erin Hunter. The series has been published in the UK since 2012 and is still going strong.