in step

[in step] {adv.} or {adj. phr.} 1. With the left or right footstepping at the same time as another's or to the beat of music; inmatching strides with another person or persons.

The long line ofsoldiers marched all in step: Left, right! Left, right!

Johnnymarched behind the band in step to the music.

2. In agreement;abreast. - Often followed by "with".

Mary wanted to stay in stepwith her friends and have a doll too.

Contrast: OUT OF STEP.