With the discovery of an incoming asteroid, the government of America formulate a plan to destroy it. When the plan fails, all the world can do is wait. The main impact zone is revealed to be Dallas, Texas. Generally, the plot follows the lives and reactions of several characters: an astronomer, her father, her son, two firefighters from Kansas, two young doctors in Dallas and the heads of the government agency in charge of the situation.

In 1928, Amelia Earhart gains fame by undertaking a transatlantic flight as a passenger. In 1937, she and her navigator Fred Noonan undertake her longest flight: a round-the-world attempt. However, the plane disappears in the process.

Roper, a hostage negotiator catches a murderous bank robber after a blown heist. The bank robber escapes and immediately goes after the man who put him behind bars.

Drew, while in a trance, drives to a small town where, a year earlier, an identical woman named Laura was murdered. Everyone assumed that Laura's boyfriend, who went missing at the same time as the murder, was the killer, but Drew starts having visions that imply otherwise, so she attempts to uncover the truth.