YOSHIDA Tadayoshi is 83 years old and who has been studying crabs for 15 years on the tideland at the mouth of the Tama River. After retirement, he suddenly attracted to crabs, and is obsessed with their charms and goes to the tideland almost every day. Through the unique perspective of him facing crabs with curiosity, this is a wonder movie that captures full of crabs with their beautiful form, color and amazing ecology of crabs in the ultimate close-up. Gigantic crabs will fill the big screen all over.