High school freshman T.J. Jackson thinks his summer will be a drag when his widowed dad dumps him off for a vacation with his Uncle Mike, a park ranger at the Gettysburg National Battlefield, Aunt Terri, and his geeky adopted cousin LouAnne. But T.J. is in for a few surprises. For starters, Gettysburg isn't the boring Civil War town he expected. A ghostly Confederate cavalier has been terrorizing nightly visitors to the battlefield. And LouAnne isn't so geeky anymore—she's become a sassy beauty who leaves him breathless.

Things escalate when the cousins, aided by T.J.'s quirky friend Bortnicker from back home in Connecticut—who also has his eye on the lovely LouAnne—attempt to solve a murder mystery that has the local police, park rangers and paranormal investigators in a panic. Because how do you stop an undead killer from 1863 from wreaking havoc in the 21st Century?