Keiko disappears in Icelandic waters, swimming east for four weeks. Unobserved, with no human contact. Since nobody knows what happened to Keiko during that mysterious time, we decided to recreate it — as a musical. From Keiko’s perspective, naturally. Watch the music video for "The Ballad of Keiko" here: https://www.youtube.com/watch?v=s1k1TQ2Lh0o Our newest podcast, “The Preventionist” is out now. Search for it wherever you get your podcasts.To get full access to this and other Serial Productions and New York Times podcasts on Apple Podcasts and Spotify, subscribe at nytimes.com/podcasts.To find out about new shows from Serial Productions, and get a look behind the scenes, sign up for our newsletter at nytimes.com/serialnewsletter.Have a story pitch, a tip, or feedback on our shows? Email us at serialshows@nytimes.com