Henry Graham is a spoiled and self-absorbed playboy who has squandered his entire inheritance. In desperate need of funds, he learns from his lawyer that he has only 30 days to repay a large loan or face financial ruin. With the help of his loyal butler, he devises a plan to marry a wealthy woman, secure her fortune, and then be rid of her. While scouting for a suitable candidate, he meets Henrietta Lowell, a clumsy and socially awkward botanist with a vast fortune but no social graces.

Henry swiftly marries Henrietta and moves into her mansion, intending to follow through with his scheme. However, as he becomes more involved in her life and complicated interests, he encounters various comical obstacles that make his task harder than anticipated. Navigating through Henrietta's eccentric world of botany and her endearing ineptitude begins to change Henry's outlook in unexpected ways. What starts as a straightforward plan of deceit spirals into an unpredictable journey, testing Henry's resolve and forcing him to rethink the nature of love and morality.