While Dean is dying, his father sells his soul to save his oldest son. After Dean's soul is saved, the doctors tell Sam that his older brother will be just fine. When Dean wakes though, Sam realizes that something is off about his big brother.
Castiel is a "functioning-single father" who is trying his best to raise his energetic and happy toddler, Jack. Dean is the anxious yet macho big brother returning home to escape the past behind him. These two meet and though it seems they come from different backgrounds, they grow close. Watch as these two grow in their relationship and close past ones all while trying to raise a toddler.