Insurance investigator Richard Cutting (Patrick O'Neal) is summoned to look into the sinking of some ships owned by wealthy shipping-magnate Curt Valayan (John Gielgud). Traveling to Switzerland, he interviews the owner and finds that his henchmen Matt (Herbert Lom) and the Big Man (Leon Greene) may be on Curt's payroll but are definitely looking out for their own interests. One agent has already been killed, and the local police inspector Ruff (Oscar Homolka) briefs Richard on the situation. Dominique (Joan Hackett) is on her way to provide some valuable information before being violently murdered. Richard tries to keep himself alive in a foreign country as he tries to solve the crimes in this dramatic mystery.