A shooting game in which the player defends the city while defeating ghosts summoned by a ritual performed by children as a test of courage, using a gun that can purify ghosts. The player becomes a girl (Ghost Shooter) with a gun that can purify ghosts, and fights to the death against ghosts and monsters that are approaching the city. Players will challenge three modes: Story, Endless, and Defense Mode to discover the hidden secrets of the ghosts. The fate of the city is in the hands of one girl. ......What is the ending that awaits you in the end?