Sierra is a second-generation Polish girl growing up in Canada who spends summers sailing Lake Ontario with her immigrant grandfather. The two set sail for what could be their last voyage together.
| Actor | Role |
|---|---|
 Stephanie JaskotSierra | Sierra |
| LLucian ModzynskiMarcin | Marcin |
| MMariya KorsunYoung Sierra | Young Sierra |
| SSheldon FrancisJupiter | Jupiter |
| JJacek KozdrakMarek | Marek |
| ZZosia KozdrakCharlotte | Charlotte |