War ravaged the planet Earth as natural resources became scarce in the late 21st century. The discovery of a new energy resource on Mars ushered in a global space race for control. After countless failed efforts to restore Earth's ecosystem, humans abandoned the dying planet and sought refuge working in the Martian mines.

Jennifer goes by many names, but is commonly referred to as the Mechanic, a merciless gun-for-hire with the unique ability to engineer a perfect kill. Fallen chronicles Jennifer's journey as she becomes entangled in the ultimate conflict over control of Mars. She may be a small cog, but her ruthlessness, precision, and loyalty to her employers could greatly impact the balance of power in the well-oiled machine of New Argolis.