Part 4/8:

As days unwind into yesterday, Grace's anger fuels her urgency to confront the man responsible for Lisa's tragic fate. During one of her attempts, she encounters Park, the man whose father was the murderer. Recognizing Park, she is taken aback but also returns to her mission, feeling the weight of every wasted opportunity to protect her daughter.

Seeking Redemption: A Race Against Time

In an ever-tightening timeline, Grace's resolve hardens as she prepares to save her daughter. She contacts Lisa's school to plead for vigilance over her daughter and hastily travels to the location of a school trip, hoping to avert disaster. Meanwhile, Park faces his struggles, dealing with his father's deteriorating mental state, all the while unbeknownst to him about the interwoven lives they lead.