The vengeance violet

Helena, the illegitimate daughter of a powerful man, is sent to the royal palace by her father to keep the Crown Prince in check. Caught between the volatile Crown Prince and the calculating Prince Julian, she carefully plays both sides, using them to destroy the father who exploited her, the Crown Prince, and the suspicious old king. Teaming up with Julian, Helena clears every obstacle standing in their way to the throne. Together, they rise to power, and Helena is ultimately crowned Queen.