Deity like figures from the after life meet up with coma patients and give them an option to live again, but in exchange you have to fight and banish evil spirits.
But the main character wasn't in a coma when he attracted one of the so called deities into his body, surprising everyone.
At first he thought that the car accident which involved him and his parents was his fault, but he later found out it was connected to an evil spirit.
Now he has to do all he can to find the evil spirit that killed and consumed his parents' souls in other to help them cross over to the after-life. I found this very interesting to watch.
I rate 9/10. (It has a season 2 as well, so when you're done with 1, watch 2.)