In 2071, the members of the space ship Bebop travel through outer space trying to catch criminals. Bounty hunters are known as "Cowboys". If they catch the criminals alive then they get a reward. If the criminals die, the cowboys get nothing. The criminals are called bounties. Most episodes are about catching a bounty. Some episodes are about the characters' pasts and lives. At the beginning there are two main heroes, Spike and Jet. Later they would meet with others. They had become the crew of the space ship Bebop. Other members of the Bebop are Faye, computer hacker Ed, and a dog named Ein.