Rest of story miserable (3,4)
I believe the answer is:
lie down
'rest' is the definition.
(I've seen this before)
'story miserable' is the wordplay.
'story' becomes 'lie' (I've seen this before**).
'miserable' becomes 'down'.
'lie'+'down'='LIE-DOWN'
'of' is the link.
(Other definitions for lie down that I've seen before include "Now idle (anag) -- short rest" , "Relax" , "Put your feet up" , "Take rest; be submissive (under)" , "Short rest on bed/sofa" .)