The Gunrunner Girl (2012)

Rei, a high school student, spent her childhood in hiding with her father, who was involved in illegal gun trafficking. He was later murdered by two men: one carrying a red gun, and another with a cross tattoo. As she matured, Rei began selling guns, mentored by Lin, who instructed her on firearms. Eventually, Lin tells Rei he has located the man with the cross tattoo, prompting her to seek revenge for her father's death.