Brad Collins, former stevedore, is rising fast in a shipping company when local communist agitators use his former Party affiliation to extort his help in stirring up trouble. When Brad resists, communist femme fatale Christine works through his brother-in-law Don. But Brad's new wife Nan sees that her husband and brother are under pressure; when she investigates on her own, party boss Vanning takes ruthless action. Written by Rod Crawford e4e