All of this starts when Four/John, Six, Sam and Bernie Kosar return to Paradise, where they were attacked by the mogadorians which resulted in Four's Chest getting taken by them and Four and Sam getting captured by the FBI, Six with BK breaks them out.
During their escape Six informs them something loric relating in going on in Spain and she wants to get their immediately, but Four refuses, wanting and determined to get his chest back and knowing its in the mog's mountain base in West Virginia, Sam and BK agrees to join Four. Six a little saddened by this agrees and she charges up the Xitharis stone with her legacy (invisibility) which will make the boys invisible for about an hour. Before splitting up, Six hands the boys an address of where to meet up with her in 2 weeks (which only Sam reads) and she informs the them about the cave having every detection device and BK can't go in the cave due to some gas that effects animals.
Four and Sam drive the SUV to Hawk's Nest where they find the map Six wrote when she escaped from the cave, giving them directions to its entrance. Before carrying on on foot Sam puts Six's address in his pocket. As dawn sets, they arrive at the entrance where they find piles of animal skeletons, making BK stay put outside. Sam sets a digital watch for an hour, the boys link hands and John makes themselves invisible.
Four and Sam have made it to the Mogadorian mountain base in West Virginia. They go through a close call when Sam pushes a guard off a cliff. Leaving BK behind because they can't bring animals into the cave, both Sam and Four enter the base using the Xitharis stone, charged with Six’s Invisibility, in order to recover his Loric Chest. They are unable to locate the chest until Four suggests that it would be hidden in the most dangerous place of the cave, the animal pen. Here they find the chest, along with another chest. Four battles a large Ape creature with his dagger. After defeating the Ape and retrieving his and another garde's chest, he destroys the mechanic controls of the base, and a large explosion erupts throughout most of the base, killing many Mogadorian trueborns that were there for celebration. They are attacked by many Mogadorian soldiers, and Sam and Four open fire on most of the assaulting soldiers after they raise the alarm. In the tunnels they find rows of prison cells in hopes of finding Sam's father, and one is damaged by the explosion and in that cell, by an act of fate, they meet Number Nine, who had been imprisoned there for a long time.
Nine is reunited with his chest and him, Sam and Four fight dozens of oncoming Mogadorian soldiers and many creatures (mostly Krauls), while Sam leaves to find his dad. Four battles many of them using telekinesis, manipulating Green Lava, and guns (it is said later that they were stolen Mogadorian blasters). Nine kills many soldiers and several Piken using his Pipe-Staff, also using his tornado stones to attack more Piken and some birds. Sam looks for his dad, and is separated from Four and Nine as they are snatched by a Piken's hand and trapped inside when the two escape after Four is blasted in the back, and Setrákus Ra (whom Four initially mistakes for Six) arrives on Earth. He enters the base and a large forcefield is raised and prevents them from going back inside to rescue Sam. Four, going after Sam, accidentally runs into the field, and is knocked into a coma.
- 'Don't worry Four, things are happening for a reason, if we're suppose to meet up with Six or Five or whoever we will and if Sam is suppose to still be apart of all this, he will be'.
- ---- Nine says to Four after the incident
Four and Nine ride on Bernie Kosar (in horse form) back to SUV. Four is feeling sick and stiffened due to the effects of the forcefield and guilty for leaving Sam behind. Despite Four claiming they should go back for him, Nine declines saying he's either 'long gone or he's upside down staring at the wrong end of a knife'.
When they make it back to the SUV, Four wants to go to Spain to find Six, but due to the FBI restarting a manhunt on him there's no way for that to be possible.
As they are about to set off, Four realises that the address of where to meet Six was in Sam's pocket, Nine tries to assure Four things will get better eventually. Four then notices the wind blowing north. Reminded of Six's theory of the wind 'pointing in the right direction', he tells Nine to drive north.
- It is revealed that Number Five was present during this event.