Yes, yes, I think I am addicted. I wanted to give Lee Min-ho another chance after the awfulness that was The Heirs, because it was his acting (and maybe also his looks) that got me hooked on K-drama in the first place. Legend of the Blue Sea (SBS 2016/17) had been recommended to me as a K-drama with an awesome female lead, and also happens to star Lee Min-ho.
This is a bit of a mix of genres. You could boil down the plot summary to: mermaid comes ashore for the first time, bumps into attractive man and much hilarity ensues. It’s a literal fish-out-water story. It’s Splash. But it’s also a historical drama (there are two timelines: one in Joseon era and one modern day), a crime drama, a family drama and of course a romance. And all of those genres appear in both comic and serious guises. Which could have been a hot mess, but it actually works pretty well.
The series opens with a crime caper: Heo Joon-jae (Lee Min-ho) is part of a team of conmen ripping off a rich woman. Joon-jae uses hypnosis and suggestion as his contribution to the team, while Jo Nam-doo (Lee Hee-joon) leads the team and Tae Oh (Shin Won-ho) handles the computer wizardry. After the con they need to lay low for a while, so Joon-jae goes to Spain.
Here we meet our mermaid Shi Cheong (Jun Ji-hyun) who comes ashore (her tail automatically turns into legs on shore) and is at first completely clueless – but she does have supernatural strength and the ability to erase memories. She takes a shine to Joon-jae and follows him around wordlessly until he caves and takes her under his wing.