A radio astronomer receives the first extraterrestrial radio signal ever picked up on Earth. As the world powers scramble to decipher the message and decide upon a course of action, she must make some difficult decisions between her beliefs, the truth, and reality.

In the summer of 1941, the United States and Japan seem on the brink of war after constant embargos and failed diplomacy come to no end. "Tora! Tora! Tora!", named after the code words use by the lead Japanese pilot to indicate they had surprised the Americans, covers the days leading up to the attack on Pearl Harbor, which plunged America into the Second World War.