In 'The Philadelphia Experiment', a secret government research project tries reviving the World War II "Philadelphia Experiment," which was an attempt to create a cloaking device to render warships invisible. When the experiment succeeds, it brings back the original ship (the Eldridge) that disappeared during the first test in 1943 - which brings death and destruction to the 21st century. It's up to the sole survivor (Lea) of the first experiment and his granddaughter (Ullerup) to stop it.

Susan and her sons Dane and Lucas Thompson move from Brooklyn to Bensonville, in the countryside. Dane is upset with the constant changes of address and the family has lived in many cities. Lucas and Dane befriend their next door neighbor, the gorgeous Julie and the brothers find a bottomless hole in the basement of their house locked with several padlocks. They take the locks off and sooner they are haunted by their darkest fears. Further, they believe that the hole might be a gateway to hell.