Félix, a 17-year-old boy, receives an invitation on WhatsApp: do you want to play the Blue Whale Game? The one with the 50 challenges? The one where you have to kill yourself at the end? Félix accepts. That is how he meets Elisa. They start completing the challenges together.
| Actor | Role |
|---|---|
 José Antonio ToledanoNot listed | Not listed |
 Karla Rodríguez CoronadoNot listed | Not listed |
 Gerardo TrejolunaNot listed | Not listed |
| MMónica JiménezNot listed | Not listed |
| MMaría Inés PintadoNot listed | Not listed |