Yeonhee suddenly disappeared after her SNS account was hacked. Detective Ui-chan, who feels there is a secret behind Yeon-hee's death, who appears as a corpse after a while, investigates the people involved and learns the truth behind Yeon-hee's death.

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The taxi driver picks up the customer and enters the apartment complex. After dropping off the customer, the taxi driver can't find the way out. Every path he takes is a dead end. Meanwhile, another guest got on board. Will the taxi driver be able to get out of the apartment complex with new guests?