This is Pope Francis' third overseas visit since his inauguration in March last year, and in the previous two, the pope made a point to reach out to those who are suffering and are marginalized.
When he visited Brazil July last year, he visited a shanty town, where he urged social justice.
During his visit to the Middle East in May, he made an impromptu trip to a wall that divides Israel from the West Bank, praying for peace.
They are messages the pope is likely to convey during his time in Korea as well.
"As Korea is at the center of conflict, the theme of the mass will be peace and reconciliation."
The leader of the Catholic Church will also deliver a message of hope to the youth at the Sixth Asian Youth Day, a gathering of Catholic young people from 29 Asian countries.
"Arise, young people in Asia The glory of martyrs is shining upon you."
The pope will also meet with people who are suffering,. including former Korean victims of Japan's wartime sex slavery during World War II, as well as survivors and the bereaved families of victims from April's ferry disaster.
He has also reached out to workers who have been laid off from Ssangyong Motor residents from Gangjeong Village in Jeju island who stand against the government's decision to build a naval base on the island, and residents of Miryang in the south of the country who lost their homes over the construction of electrical transmission towers.
All have been invited to a mass for peace and reconciliation on Monday, where Pope Francis is expected to deliver a message on healing and social justice.
Park Ji-won, Arirang News.