Chasing his dream to join an elite K-9 unit, a state trooper partners with a fellow underdog: clever but naughty shelter pup Ruby.Chasing his dream to join an elite K-9 unit, a state trooper partners with a fellow underdog: clever but naughty shelter pup Ruby.Chasing his dream to join an elite K-9 unit, a state trooper partners with a fellow underdog: clever but naughty shelter pup Ruby.