Taxi driver Young Ho picks up Min Jung and heads towards the reservoir. Both the destination and Min Jung are mysterious. This is a confined-space psychological thriller gradually uncovering the past of the two characters, featuring a meticulously crafted plot and clever direction. The clash between a man transitioning from a somber face to a cold demeanor and a woman shifting from a cold appearance to a boiling expression creates a gripping narrative. The genre's elements make it quite intriguing.