Dad went out to get supplies, leaving jinwoo Thieves got in their hideout (possibly the hounds) tried to ransack their supplies, beat up jinwoo Dad returned and fought off the thieves, Dad left again to get water (possibly stealing some from gunwoo's party/the hounds) Gunwoo follows the dad back to their hideout Gunwoo kills dad for stealing Gunwoo finds jinwoo.
My theory:
Dad went out to get supplies, leaving jinwoo
Thieves got in their hideout (possibly the hounds) tried to ransack their supplies, beat up jinwoo
Dad returned and fought off the thieves,
Dad left again to get water (possibly stealing some from gunwoo's party/the hounds)
Gunwoo follows the dad back to their hideout
Gunwoo kills dad for stealing
Gunwoo finds jinwoo.