A crayfish party is being held on a private island in the Finnish archipelago in honor of Ray Dunhew, who is an important customer of the party's host and who is visiting Finland for the first time. Copious amounts of schnapps will be consumed and the host and his wife have solicited the help of Sophie, the attractive eighteen-year-old daughter of very good friends of theirs, to make sure the schnapps glass of each and every guest is topped up.
All goes well until most of the crayfish have been consumed and Sophie is walking round the table filling up the glasses for the last time. As she stands beside Dunhew, filling up his glass, she freezes. She gives him a long hard look and then continues round the table filling up everyone else's glass. She then goes back into the kitchen and, with tears in her eyes, reports that Dunhew had just molested her.
The morning before Dunhew is due to fly back to England, he goes missing.