After a fire destroys her laundromat, a single mother is tricked by a voice phishing scheme. She decides to investigate the criminals behind it.

Grieving the loss of a best friend she couldn’t protect, ex-bodyguard Ok-ju sets out to fulfill her dear friend’s last wish: sweet, sweet revenge.

Thieves overtake the mint of a unified Korea. With hostages trapped inside, the police must stop them — as well as the shadowy mastermind behind it all.