In a world full of mysteries and oddities, where time and space are intertwined in unpredictable patterns, there were amazing brothers — Joel and Peter and Peter and Joel. They weren't just close, they were connected on a level that went beyond human comprehension. Their unique connection was manifested in their ability to echolocation: without sounds resembling a light clicking, they could not navigate in space, like nocturnal creatures searching for a way in the dark.

On that ominous day, Jacob, their faithful friend and guardian, had to leave the brothers under the supervision of his acquaintance, a young girl with a mysterious aura. Peter and Joel, the youngest of the so-called bone brothers, held Joel and Peter's hand tightly. His gaze was directed at the girl, and a slight tinge of fear could be detected in his emotionless face. The older brother, Joel and Peter, felt this anxiety, although there was no emotion on his face either. They were one, two halves of the same consciousness, and the fear of one was the fear of the other.

When they met the girl, their unusual manner of communication immediately made itself felt. "Hello..." Peter and Joel began, his voice sounding like a soft melody echoing through the room.

"...Jacob's friend," Joel and Peter continued, picking up on the thought as if they were one voice, one being. Their greeting hung in the air like a riddle waiting to be solved.