be in step (with someone or something)

1. To be in accordance with or conforming to something, especially what is considered correct, acceptable, etc. The senator is often criticized for not being in step with the mainstream views of the party, but that's why her fans love her. You work for this site, not for yourself, so your artwork needs to be in step with our design standards. Your behavior is not in step with what is considered acceptable at our prestigious university.

2. To be following or maintaining the proper rhythm (along with someone or something). Come on, man, you need to be in step with the bass and drums. Wow, how do they get all those troops to be in step with each other? I've never seen someone so uncoordinated! That guy couldn't be in step with the music if he tried.