“One small act can change everything.”
Teddy Colbert is a man, husband, and father whose life is such a bad luck for him. He feels entrapped in his job as copywriter in an advertising company, since he is science enthusiast. His works are always declined by his boss, Jack Turnbull. Turnbull much prefers Colbert's fellow copywriter and archrival, Greg Sanders. At home, Colbert and his wife, Laura, and their son, Tim, live with Laura's parents, who put the blame on Colbert for their daughter and grandson's tough life.
One day, his estranged father, Ron, is dying in hospital. He finally reveals to Colbert their family's secret: every men in Colbert family is a time traveler since their birth. Ron finally dies and Colbert decides to use his time travelling power to prevent an unintended event, when he and his family went to Massachusetts for Colbert's MIT entrance examination. Their car was rammed by a speeding truck in highway and killed his mother. He could not pass the examination and failed. By using his power, he can prevent the truck from crashing their car and ensures that his younger self can pass the examination.
He returns to the present time, when he is no longer a copywriter, but he is a businessman, establishing his own programming company after graduating from MIT, living an extravagant lifestyle. But, the world he knew earlier is different. He does not marry, and he never knows Laura, who is Sanders' wife. His new world is also threatened by ensuing nuclear war between United States and its opponents. Feeling guilty for his earlier actions, Colbert hardly tries to change his life once again.
Teddy Colbert : 34-year-old and struggling copywriter. Jis life is changed after his father reveals their family's secret.
Laura Colbert : 33-year-old and former ballerina, who is Teddy's high school sweetheart and wife.
Tim Colbert : 9-year-old boy and Teddy and Laura's son.
Jack Turnbull : 57-year-old and advertising company boss, who is foul-mouthed and hotheaded.
Greg Sanders : 34-year-old copywriter and Colbert's archrival. He is favored by Turnbull.
Ron Colbert : 64-year-old former police officer and Teddy's father.
Linda Colbert : Ron's wife and Teddy's mother who was killed in a car crash.
Sandra Clarke: 30-year-old fashion model and Colbert's fiancee in his new world.
Beth Wilson: 27-year-old intern at Colbert's programming company and Colbert's secret lover.
Bob Jennings: 60-year-old war veteran and Laura's father, who put blame on Teddy for his daughter and grandson's tough life.
Anne Jennings: 60-year-old woman, Bob's wife, and Teddy's mother-in-law.
Tom Lovett: 49-year-old attorney and Colbert's company legal counsel. He also acts as Colbert's consigliere.
LIN: an artificial intelligence created by Colbert's programming company, serving as home artificial intelligence.
NIMROD: an upcoming artificial intelligence created by Colbert's programming company intended for military purpose.
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