What does it mean to be "caught" by the wraith? Does it just have to move onto your location? Or does it have to perform a a basic action or special effect that does damage to your character?
Hi! It's just as Rikard said.
The "caught" word is just a description of what happens when you run out of turns. So when you decide to skip this slumber or when you run out of turns, you're caught, and you have to resolve script 770.
No it means when you are out of turns (at the end of turn 4 normally), You're Caught - resolve S.770 (the same happens if you decide to SKIP this slumber).