Spocter2Silly
Everyone with a soulmate can hear their partner's thoughts. But, annoyingly, that sense comes at different times for different people and different ranges for different pairs.
And, much to his dismay, Mordecai has recently been hearing his soulmate in his roaring late twenties. Way later than most.
TLDR
Mordecai has the misfortune of being able to hear his soulmates thoughts, then gets sent on a suicide mission.
(ReWrite of CsTH)