Chapter 1:

Danny Fenton is largely regarded as an ignorant slacker as a result of his schoolwork and study time consistently being interrupted by ghost attacks. Thankfully after Danny is crowned high king of the ghost zone he is able to reign the ghosts in and makes them all swear an oath not to cause trouble, they are still allowed to visit the human world of coarse, some even mask themselves as human and lead ordinary lives even while being dead.

With more time on his hands and little to no ghosts attacks Danny misses the rush he used to get. Then one day a man collapsed in front of him, Danny is able to save the man using CPR and he discovers his new affinity. Medical practice.