As Chrysalis holds her wife one night, Twilight just can't seem to doze off. The semi-newlyweds have cuddled their way into dreams many times but tonight, Twilight finds herself unable to rest. The alicorn dwells on a mare who held her like this before, when she was only a filly, chasing away the nightmares when her parents weren't around. She can still remember her sweet, sad singing- but what was that tune again...?