Joe and his friends' plan to present the local street dog Skipper to Joe's dad, who works on the USS West Virginia, as a mascot dog for the ship, is interrupted by the Japanese surprise attack on the harbor and it may be up to Skipper to save them.

"When Matt's older brother enlisted in the army, he left Matt his German Shepherd, Chief, a retired fire dog and the best pet EVER. So Matt isn't happy when Chief starts paying attention to his foster sister Rachel instead of him. But when Nazi planes begin bombing the city, Matt finds himself in an impossible situation. Can he be a hero to his sister when it matters most? And when they get caught outside during the air raid, will Chief be there to...

When they hear about the Dogs for Defense program, twins Charlie and Kate know their yellow lab Buster would be a perfect soldier dog. So they enlist Buster in the Coast Guard, where he works alongside Army horseback patrols to protect US shores from German U-boat attacks. Back home, Charlie and Kate discover a threat of their own--a coded message about a Nazi sabotage plan! With danger on every side, can Charlie, Kate, and Buster defend US shores...