The magic tree house takes Jack and Annie back in time to England in 1944, where the country
is fighting for its life in World War II. Before long, Jack and Annie find themselves
parachuting to Normandy, France, behind enemy lines, and they realize that they’ve arrived
on the day before D-Day. Will the brave brother and sister be able to make a difference
during one of the darkest times in history?
— based on fandom.com