Seven academy cadets were supposed to complete a simple first training mission beyond the safe edge of academy space.

The cadet crew includes Haru Minase, the captain cadet; Riku Aozora, the pilot cadet; Mei Tachibana, the engineering cadet; Sora Kanzaki, the navigation cadet; Hana Mizuno, the medical cadet; Daigo Arakawa, the security cadet; and Yui Hoshino, the comms and systems cadet.

No adults were aboard. No danger was expected. Their instructors watched from command, ready to take remote control if anything went wrong.

Then the cadets woke scattered across a damaged ship.

The engines were silent. The comms were dead. The star maps no longer matched the sky outside the viewport. According to the ship, the training route had been completed successfully — but the academy was gone, the nearest beacon was unknown, and every star beyond the glass was a stranger.

Now the cadets must repair their ship, survive impossible worlds, and chart a way back from beyond known space.

Their first mission is over. The journey home has just begun.