Enterprise has finally reached Azati Prime, the site of the Xindi superweapon. Unfortunately, Reed can't find any weak spots in the Xindi's formidable detection grid. Archer suggests utilizing the Insectoid shuttle the crew recently salvaged to sneak past the grid and locate the weapon — perhaps they will be able to blend in. After learning how to operate the craft, Mayweather and Trip take it into Xindi territory, hoping to scan the weapon. They clear the detection grid and find that the planet is largely oceanic. They detect what could be the weapon, so they take the shuttle underwater. Once there, they find what they're looking for: the weapon is massive, a truly impressive and horrific sight. They take their scans and head back to the ship. Meanwhile, Enterprise is detected and scanned by a Xindi monitoring facility on the moon's surface. Archer, worried that the facility will alert the rest of the Xindi, is forced to destroy it.