What if humanity’s greatest threat was not an invasion, but an invitation? When Helix Hollow detects an impossible signal, the Circle uncovers a dimensional corridor being built between realities. If it stabilizes, an unknown intelligence will cross into our world—and it has chosen one of their own as the conduit. As psychic attacks intensify and reality begins to bend, the team must sever the gateway before the invitation is accepted and humanity faces something it was never meant to survive.