Twin sisters Kelsey and Michelle Maxfield look identical -- but they couldn't be more different. Kelsey is the captain of the dance team and loves her cute college boyfriend, Davis. Michelle is a free-spirited artist and flits from one guy to the next, the latest a soldier recently deployed to Afghanistan. Despite their differences, Kelsey and Michelle can't live without each other -- until, in an instant, everything changes.

When Michelle dies in a car crash, Kelsey is left without her other half. She takes it upon herself to find her sister's boyfriend, Peter, and tell him what happened to Michelle. But when she finally connects with Peter online, he thinks that Kelsey is Michelle and says that seeing her is the one thing keeping him alive. Caught up in the moment, Kelsey can't bear to break his heart with the truth, so she lets Peter believe that she is Michelle.

Kelsey keeps up the act, pretending to be her sister, and soon she can't deny that she's falling, hard, for the one boy she shouldn't want.