Events of the visual novel Malevolent Planet Unity 2D take place in a fictional alternate dimension where human civilization has gone through a lot of trials and scientific discoveries to achieve impressive successes in development and relocation to neighboring solar systems. Large colonial cities were created on distant planets, and earthling states met with developed representatives of other civilizations.

The main character of Malevolent Planet Unity 2D is a young attractive girl with great prospects, because she managed to withstand all the hardships of obtaining a higher education at a reputable university. She enters the civil service and immediately receives an order from higher command – the little girl is sent to the distant sector to investigate a mysterious anomaly on the surface of a celestial body. Long limbs erupted from unknown voids, capturing bystanders in deadly embraces.

Next, the user comes into play and, controlling the protagonist, moves her forward and makes fateful decisions that affect the further manipulations of the central character. The lady fights against an extraterrestrial infection and meets local colonists, especially men – with them the adventurer easily strikes up close relationships and makes love – erotic scenes are shown in the format of separate explicit pictures.