Sun doesn't understand Frost's paintings. Sun thinks there is only one way of painting - HIS! But as winter goes on, he is more and more interested in Frost's weird designs. The only problem is, when Sun looks at Frost's paintings, they all melt. Frost gets fed up and paints so thickly, that the thaw next day means Sun catches a cold. With Sun in bed, and Frost sulking, can Rainbow persuade them both to take up their brushes again?