Everyone thinks Su Tang, an art student who paints for a living, has struck it lucky by marrying up to Gu Shiyan, a powerful business tycoon, through a family marriage agreement. What nobody knows is that their meeting, despite their six-year age difference, is the result of fourteen years of carefully concealed intentions on his part. Inside an old wooden chest locked away in his study are half of a faded crayon drawing, a stack of old Polaroids with curled edges, and a bundle of letters filled with a young boy's heartfelt thoughts that were never sent. They are the unspoken devotion he has carried across mountains and seas. Using their engagement as a shield, he protects her as she gradually transforms from shy and timid into a woman who confidently reveals her brilliance. With her sincere love as the key, she unlocks the tenderness hidden beneath his cold exterior. After reuniting following a long separation, their secret love finally comes to light, and in the time they have left, they slowly find their way into each other's arms.