Sawajima Yuichi—a time-traveling reporter working for Time Scoop Inc. Journeying through the ages, he gathers footage of people who didn't make it into the history books. This time, he visits the mid-16th century during Japan's Warring States period to report on the use of yabumi, top-secret messages tied to arrows. If a castle was under siege, you could get vital information in, or a plea for aid out. Saburota, a retainer of the Yamana family, must fire a yabumi into the besieged castle of Lord Takenaga, an important ally. The path is fraught with danger ... will he be able to succeed?