Now that her mother and Robert are married, DJ's latest challenge is breaking in her blended family. But the new house isn't ready for them, so Robert and the twins must squeeze into DJ and Lindy's tiny house for several weeks.

All too soon, DJ learns that having a family means spending time together. But between her growing responsibilities at Briones Riding Academy and catching up on homework after a week with the flu, DJ has trouble fitting it all in.

Trapped in close quarters, DJ longs for privacy. But at the same time, she feels isolated from the rest of the family. For once, DJ must deal with her jealousy of the Double Bs. And when a horse show comes in the way of DJ's art, a full-scale family war threatens to break out!