The sudden emergence of twisted labyrinths in the midst of the desert was called the “Phantom Phenomenon”. Adventurers and researchers flocked to the royal capital, attempting to unravel their mysteries. Among those is a former royal knight in search of his missing brother, the protagonist of the previous game. Upon his arrival he is surprised to meet Rayne Reifido, a court magician researching the Phantom Phenomenon, who also happens to be his ex-girlfriend.
Phantom Knight is the second game in the Mugen no Meikyū series. Like its predecessor, it is a solo dungeon crawler with real-time combat. Visually and gameplay-wise it is very similar to the first installment. Differences include slightly modified interface with point-and-click attacking, additional types of items, and extras found in towns such as a special dungeon full of traps that requires precise memorization to complete. The game contains scenes with nudity and sexual situations.