Danny and his class go on a field trip to Gravity Falls. Dipper, Mabel, Wendy, Soos, Stanley and Stanford was sucked into a natural ghost portal that opens every 100 years near the Mystery Shack where surprising everyone mentioned was sucked into the Ghost Zone. Will Danny be able to protect everyone from his enemies in the Ghost Zone and will Sam come clean on being a halfa after the Undergrowth incident two years ago? Will Ford experiment on Danny if his secret gets out? Will Danny be able to bring them to the Fenton portal that is miles away? Read to find out more. I don't own Danny Phantom or it would still be on and I don't own Gravity Falls either...obviously. This is Phantom Falls fanfic and probably the first one that has a field trip to the Ghost Zone. Hope you like it. Enjoy!!! -LadyNoir303