First impressions last. For Evie Collins, that meant falling in love with Grayson Phillips the day he moved in next door. The same day he saved her from falling...and simultaneously sentenced her to a fate of pining after her brother's best friend for years.

Moving back to Charleston to begin residency was supposed to start a new chapter. One free of the pesky, pointless childhood crush Evie left behind. Her feelings for the boy next door might be in the past, but Gray is perfectly present. In town for three weeks; home on leave from the Air Force; and, since he's still her brother's best friend, impossible to avoid.

A summer fling sounded simple. Stress relief from the grueling hours of residency. Some fun following a breakup. Clear boundaries with an obvious ending: he'll fly away...again.

But secretly sleeping with the guy you've compared all others to? Complicated. Even more confusing? The glimpses of their shared history that suggest her crush on the boy next door wasn't as unrequited as she thought.

Goodbyes are always hard.

This one could prove impossible.