A retired Central Security Bureau officer suffering from dementia. He takes on a surrogate grandfather role for his neighbor Cherry and engages in lethal combat to rescue her from gangsters, motivated by unresolved guilt over his own missing granddaughter.
Direct violent confrontation where Ding targets Choi to recover Cherry.
Ding acts as a protective guardian figure for the neglected child.
A mutual attraction develops between the elderly landlord and her retired tenant.
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