Stosh travels back to 1969 to try to prevent the untimely death of Roberto Clemente, a legendary baseball player and humanitarian, but upon his return to the present, he meets his own great-grandson who takes him into the future, and what he finds there is more shocking than anything he has encountered in his travels to the past.

With his ability to travel through time using baseball cards and photographs, thirteen-year-old Joe and his mother go back to 1863 to ask Abner Doubleday whether he invented baseball, but instead find themselves in the middle of the Battle of Gettysburg.

The ball hit me. It sounded like a bomb going off in my head. Everything went dark. The last thing I remember was hearing somebody yell, "Call 911!" When Stosh gets hit in the head with a baseball, he's lucky to survive. Then he learns about another player who wasn't so lucky-Ray Chapman, the only player in major league history to get hit by a ball and die. If only they'd had batting helmets back then . . . Get ready to go back in time as Stosh travels...