Alex Harris has always known she was adopted but never really thought about the story behind Colonel Harris and his wife adopting her...until her real mother, Herin, made contact and revealed that Alex's background and talents were just as unusual as her two college roommates, Bree Kirstan and Jori Lawrence.

Alex was born in another universe, daughter and heir to the captain of a Leap ship. Her genetics have the special "tweak" that allow her to link her mind with a ship and slide through the fabric of space, going from one universe to another. Herin was injured in the attack that resulted in their ship being stranded in orbit behind the moon, and she can no longer take her ship and crew home.

An Air Force investigator who's been harassing the Colonel for years has actually been after Alex all along. Time is running out, and the enemy is getting closer to the truth and closer to capturing the "alien invaders" they've sought for years. What will Alex need to sacrifice, to help her birth-mother and protect her father's career?