When Jack X was a toddler, his parents were murdered while he sat playing in his room. But this wasn't a random crime, his father was an alien hunter working his way through a list of wanted aliens who were seeking to wreak havoc and devastation on Earth. Now Jack must take on his father's fearsome work. As Jack goes on a mission to eliminate number 6 on his list, he faces a life threatening battle and a journey to his home planet, somewhere he knew nothing about. His visit finds the planet in a desperate fight for survival and it is here that Jack finds family he never knew existed. With their help, and with the help of his dear friends, Jack finds the power to continue crossing names of his list. His ultimate aim - to kill number 1, his parents' murderer - is within sight.