The greenleaf family, which runs sprawling memphis megachurch calvary fellowship world ministries, appears to be a loving and caring clan. beneath the surface, though, exists scandalous secrets and lies. greed, adultery and sibling rivalry are among the issues that threaten to test the family's faith and tear the group apart. the scandalous happenings are uncovered by grace, the estranged daughter of church leader bishop james greenleaf, when she returns home after a 20-year absence. oprah winfrey has a regular role on the show as mavis, grace's aunt.