When Candy arrives home from school to find her entire family murdered, she turns to the only one she trusts, her uncle, Joseph "Rock" Barton. Rock's a reclusive hitman and "cleaner" who's been in service to Candy's father for years. He takes her in, and together they vow to avenge the murders. When she turns 18, her plans go into effect as she knocks off all her father's enemies, one by one, going up against some of the most dangerous killers in the game. But has she put her trust in the right hands?