You arrive in a strange land via a temporal anomaly, transported into a forest on a colonized moon called Alpha, or Sanctum. You are greeted by a member of The Children of Gabriel, a group of people who choose not to live in the city of Sanctum, but in the forest. A Child of Gabriel Guide escorts new arrivals from the forest welcome center to the city of city of Sanctum, every few days. As you must not only pass through the forest but also the radiation shield that protects Sanctum, waiting for a guide is highly recommended. Once in the city, you will be assigned housing and you will be expected to help rebuild society. Many dangers lurk for residents of Sanctum, including the Red Sun Eclipse, which occurs when:

The moon undergoes a celestial event in which the two suns eclipse, triggering the release of a psychosis-inducing toxin from the plants. During the eclipse, sonic anomalies are sometimes caused by molecular vibrations in the air and trees. When exposed to the toxin, all fauna are affected and goaded into violence. Those killed after the eclipse is over are consumed by the plants and trees. This celestial event and the toxin itself are known as the Red Sun.

There is also a risk of Temporal Flares.

A temporal flare seems to be a green light source in the sky that shoots out other green flares that burn, destroy, or "petrify" anything they touch.

The city of Sanctum has a broadcast system in place to alert residents of a temporal flare, and the necessity to take cover, as exposure can be deadly. If you choose to leave the protected city of Sanctum, you will have to find a way through the radiation field to the forest on the other side. Many dangers lurk in the forest, including the temporal anomaly from which you arrived. If you attempt to return to the anomaly, you will be spit back out into the forest. Arrival through the portal is a one-way portal, for the most part, but the anomaly is not interested in taking you back. It is up to you to survive in this harsh new world where dangers lurk in shadow. Do you have what it takes to survive?