Shelly's Future Past is a sci-fi erotic time travel adventure centered around a 23-year-old lesbian woman named Shelly, living in the futuristic world of Cyber City in the year 3077 alongside her best friend, Triss. Shelly's life has been an emotional whirlwind, and her unique abilities will surface as the story unfolds. One day, a mysterious woman from the future appears, someone who knows Shelly intimately. She seeks Shelly's help to prevent the end of the world, which is being orchestrated by five powerful men who have taken control of Earth in the future. Shelly initially believes her mission is to travel back in time to change the past and secure a better future. However, she soon discovers that her true task is to correct the timeline itself. To do so, she must visit five periods, each with a different woman whose pregnancy she must prevent. These pregnancies would otherwise lead to the birth of the ancestors of the five powerful men responsible for Earth’s downfall. However, Shelly's task won't be simple, as one of the powerful men is also moving through time, determined to safeguard his bloodline and secure his future dominance.