Grant is the oldest Landon sibling and a lawyer and after his father's death he has been left guardianship of Crista. He thinks she is a twelve year old when in reality she is almost twenty one.
Their first meeting is accidental and doesn't end well and both are aghast at being saddled with each other, she walks out and he has every intention of turning the guardianship down but when he goes to tell her that and sees her with her room-mate who he presumes is her lover, in a fit of anger he agrees and makes her move in with him.
As usual he acts like a jerk so that he isn't tempted to kiss her but he somehow keeps doing that. He also seems to have lot of mis-understandings about her and needs a nudge from his family to figure it out that he is in love, all in all typical Marton.