Basically A dies, or at least thinks so, and has been roaming round as a ghost. Nobody can see or hear or touch him..until he finds himself in front of a stranger named B that can. And together they try to figure out what happened to A and what he’s doing on Earth if he’s really dead. Of course, A and B fall in love. 

I've considered: 

Cool Touch, Warm Heart
Flicker from View
Soul Purpose
A Dime for a Dollar, a Soul for a Friend
You Are Warm (Your Body is Not)
Whisper of Something Real
Reflection of Me
Reflection of You
Haunting These Halls
Not Quite Dead
Dead and Not Gone