Finn hopes to rekindle his relationship with Flame Princess .
The Flame King , along with the help of Don John ( voiced by Roddy Piper ) , escapes from his prison and reclaims the throne , forcing Flame Princess to turn to Finn for help .
Finn hopes to rekindle Finn 's relationship Flame Princess   Princess .
The Flame King , along with the help of Don John ( voiced by Roddy Piper ) , escapes from his prison and reclaims the throne , forcing Flame Princess to turn to Finn for help .