Construction workers in World War II in the Pacific are needed to build military sites, but the work is dangerous and they doubt the ability of the Navy to protect them. After a series of attacks by the Japanese, something new is tried, Construction Battalions (CBs=Seabees). The new CBs have to both build and be ready to fight.

John Wayneas Lt. Cmdr. Wedge Donovan
Susan Haywardas Constance Chesley
Dennis O'Keefeas Lt. Cmdr. Robert Yarrow
William Frawleyas Eddie Powers
Leonid Kinskeyas Johnny Novasky
J.M. Kerriganas Sawyer Collins
Grant Withersas Whanger Spreckles
Paul Fixas Ding Jacobs
Ben Weldenas Yump Lumkin
William Forrestas Lt. Tom Kerrick