Five 17-year old teenage girls and best friends, blonde girl Carol Armstrong, brunette Sheila Jefferson, african-american Milly Peterson, nerdy Amanda Ward and rebel girl Marjorie Johnson, are going to a amusement park named "Amusemania", a park full of dangerous things, inside, the park has double roller coasters, merry-go-rounds, and a scary attraction "The Ghostly Basement", the girls said what to do:

"We have to split up, girls" said Carol.

"Yes,i'll go to the double roller coasters" said Sheila.

"I'll go to the merry-go-rounds" said Amanda.

"Me too." said Milly.

"I'll go to...Carol,i'm very meek, which attraction i will go?" said Marjorie.

"Marjorie, it's fine, go to The Ghostly Basement" said Carol.

"OK" said Marjorie.

The girls goes to the attraction, Marjorie enters in The Ghostly Basement, the attraction has a cart which leads to the basement and the exit, however, Marjorie gets trapped and notices it's surreal, After having fun, the girls notice their friend Marjorie, it's not with them, and realizes she is stuck in the Ghostly Basement, Milly finds a note on Marjorie's pants saying it was a ghost disguised as the owner of the park, the note said:

"You Liked Amusemania? that's right, a rebel girl with black and pink hair appeared and has fallen into our trap, i wrote this note and i put on her pants, have fun at Amusemania."

Shocked, the girls decides to go to the ghostly basement to find Marjorie.