Daisaku and Minami suspect that a strange villa standing in the heart of the Japanese Alps is a secret base of BF Syndicate. They approach the house to get some proof, when men in the house notice them and look for them.

Beginning with the Swiss Branchg, the Unicorn branch headquarters are mysteriously destroyed one after another. Rome, Cairo, Bombay, Singapore, Hong Kong, then Tapai. It is easy to guess that Tokyo will be next.

A strange huge plant which has appeared suddenly in Sagami Lake sucks in all the water including a sailing boat and a man in it.