Well-meaningly accepting her future younger brother's fiancée for co-renting, she instead suffers boundary-crossing, card-stealing, frame-ups, and familial kidnapping. Facing step-by-step schemes, she no longer tolerates, using wisdom and law to guard her bottom line, making the greedy reap what they sow, and also letting her younger brother see the truth clearly and wake up suddenly. Kindness has a ruler, tolerance has a limit; boundaries clear, only then can one be favored by love. The net of justice is vast and sparse, evil cannot prevail over uprightness, and sunshine will eventually illuminate everyone who guards their bottom line.