A remote world is rumored to possess a "treasure" of the angels, but that treasure is sealed so no one can access it. Although it's not a Starfire world and time is closing on the planned attack of the Issan installations, Nya creates a portal for a quick investigation.

When they arrive, they find puzzles that no one has solved, because only Inari can access the answers; but the Paxons would like to know what it is and insist on joining the expedition. L'Ni and his team barely tolerate the Paxons, but the desire for them to join the mission to destroy the Issan power installations forces their cooperation. What lies beyond a complex of puzzles is a tomb with a mysterious phantom taunting those who dare enter. When it drives the investigative teams into insanity, escape becomes a fight for their lives and risks fracturing any possibility of an alliance.