A father and his son are losing the race. To win, the boy turns himself into a car tyre. Sierra looks at toxic masculinity through dark irony, while pulling us into the surreal car racing world. Loosely inspired by the director's childhood, this animated black comedy includes fragments of a stop motion film animated by the director's father during Soviet Estonia.
Unfortunately the movie Sierra is not yet available on Disney Plus.
| Writing | Sander Joon | Writer |
| Production | Aurelia Aasa | Producer |
| Production | Erik Heinsalu | Producer |
| Sound | Misha Panfilov | Original Music Composer |
| Camera | Sander Joon | Director of Photography |
| Editing | Sander Joon | Editor |
| Directing | Sander Joon | Director |
| Art | Sander Joon | Art Direction |
| Sound | Matis Rei | Sound Designer |
| Sound | Matis Rei | Sound Editor |
| Sound | Matis Rei | Sound Mixer |
| Crew | Jonas Taul | Thanks |
| Crew | Joni Männistö | Thanks |
| Crew | Mikk Mägi | Thanks |
| Crew | Jaagup Metsalu | Thanks |
| Crew | Jelizaveta Mušnikova | Thanks |
| Crew | Katarina Skott | Thanks |
| Visual Effects | Heikki Joon | Animation |
| Visual Effects | Henri Kaido Veermäe | Animation |
| Visual Effects | Valya Paneva | Animation |
| Visual Effects | Teresa Baroet | Animation |
| Visual Effects | Sander Joon | Animation |
| Production | Liidia Heinsalu | Accountant |
| Art | Hleb Kuftseryn | Background Designer |
