People are always coming out of Matsu's Bathhouse saying, "ah, that warmed me up." Tama and friends see this and think it's strange. They sneak into the bathhouse determined to discover the secret!

Gon is in shock after his chair bearing a relief of his beloved hero, Wolf-han, is sold. Tama and the others head to the place it was sold to, determined to bring it back somehow, but...
"The mystery of Matsu's Bathhouse."
".لغز حمامات ماتسو"
Das Geheimnis von Matsunoyu.
El misterio de Baños Matsu.
El misterio de Baños Matsu.
Le mystère des Bains Matsu.
"Il mistero dei bagni pubblici Matsu".
O mistério da Casa de Banho Matsu no Yu.
«Тайна бани Мацу».