Taew, Mod Dum, and Cartoon are back when they receive a mysterious letter asking for their help to investigate an even more mysterious dormitory. When they arrive they do sense something wrong but they’re unsure of what, so they decided to stay and investigate. They call their friend Pancake to help. Waew-Sawad and Suan-Sawad, the two caretakers of the dorm, are very suspicious when they forbid the sisters and Pancake to certain parts of the dorm. What is wrong with the dormitory and what secrets are Waew-Sawad and Suan-Sawad hiding?