Revenge on My Ungrateful Master

Ethan Lee was entrusted to master David Coleman. After 3 years, Ethan was kicked out. Eleven years ago, he found paralyzed master abandoned by three sons. Ethan cared for David for eleven years. When six million compensation was issued, David's three sons reappeared. David gave all six million to sons, leaving nothing for Ethan. Ethan confronted David. David threatened suicide; Ethan recorded him, severing their bond.