Tottoko Hamtarou OVA 2: Hamuchanzu no Takara Sagashi Daisaku - Hamuha! Suteki na Umi no Natsuyasumi

(Esta sinopse está em inglês. Ajude a comunidade traduzindo!)

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As Laura heads out to summer camp, Hamtaro and Oxnard come across a young girl by the name of Haibi, who's trying to find the ocean. Haibi found a treasure map while searching through the storage burrow and is now willing to find the treasure to help her heat exhausted granny. The Ham-Hams, who are more than willing to help her, pack their things and set out to find the treasure.

(Source: Wikipedia)