Everton Chronicle

In 1981, five kids met at the top of a mountain to witness a meteor shower that occurs every 100 years. After a meteor was seen falling to their area, the kids were never seen again, except for one.
40 years later, a group of kids from different social groups are thrown into detention for spreading rumours about a fellow student, Sienna, who's grandmother claimed to be the sole survivor. Due to a celestial mishap regarding the book hit by the meteors energy in 1981, the kids in detention are transported to the cliff in 1981, trapped within a time void along with the other five kids. Together they figured out a way back home together, saving the 1981 kids at the same time.

After arriving back in 2021, everything seems to be fine.. until the kids find out that Sienna never returned with them, and according to public records, never existed. The only way to figure out how to get her back, they must once again go back to 1981, and prevent Sienna's grandma from suffering an unfortunate celestial fate, before time and space itself collapses around them.