By chance, Natalie saves Sebastian, who has been trapped in a deliberate scheme, and the two spend an unforgettable night together. Sebastian leaves behind an expensive luxury watch and promises to grant her any single wish she makes. Natalie has no idea that Sebastian is the mysterious CEO of Grand Crest Group, and the global hotel chain where Ryan works is also one of his countless subsidiaries.
Meanwhile, Grand Crest Group suffers a massive missing fund crisis. Sebastian launches an investigation to find the true genius who cracked the legendary Blackwood Case six years ago—a talented investigator hidden from the public for years, who turns out to be Natalie herself.
As her wedding date approaches, Natalie makes a bold request, asking Sebastian to stand in for her and complete the wedding in her place. Sebastian agrees instantly but refuses to treat it as a fake performance. Instead, he proposes turning the deal real, officially registering their marriage as legal spouses.
After getting married unexpectedly, Natalie and Sebastian begin their contractual yet sincere marriage life. Before they can sort out the huge gap between their identities, Grand Crest Group falls into a terrifying 100-million-dollar cross-border capital crisis. Natalie quickly sees through the enemy’s trick of using small refunds to test the company’s risk control threshold. Racing against time, she recovers all the lost funds and uncovers the hidden system backdoor planted by the Whitmore family.