In this chapter the law scholars Haksoo Ko, Sangchul Park, and Yong Lim, analyse the way South Korea has been dealing with the COVID-19 pandemic and its legal consequences. Instead of enforcing strict lockdowns, South Korea imposed several other measures, such as a robust AI-based contact tracing scheme. The chapter provides an overview of the legal framework and the technology which allowed South Korea to employ its technology-based contact tracing scheme. Additionally, the authors showcase the information system South Korea implemented, as well as the actual use of the data. The authors argue that South Korea has a rather stringent data-protection regime, which proved to be the biggest hurdle in implementing the contact tracing scheme. However, the country introduced a separate legal framework for extensive contact tracing after its bruising encounter with the Middle East Respiratory Syndrome (MERS) in 2015 which was reactivated and provided government agencies with extensive authority to process personal data for epidemiological purposes. The AI-based technology built in the process of creating smart cities also proved handy as it was repurposed for contact tracing purposes.