Top engineer Evelyn and her husband Julian once planned to chase their aerospace dream together in Silicon Valley. Yet Julian secretly altered their plans for Clara, taking it for granted that Evelyn would keep sacrificing for him. Instead of lingering on conflict, Evelyn chose divorce and moved to California for research. After marrying Clara, Julian uncovered her true identity as a foreign spy and ended up trapped, dying in a foreign land. Having healed from heartbreak, Evelyn completed the hypersonic drone test flight on her own and realized their former shared dream.