step into something
1. Lit. and step in something to step into something wet, messy, or dirty. Don't step in the mud! What is that stinky stuff you stepped into?
2. Fig. to involve oneself in some matter; to intervene in an affair or dispute. I will have to step into the business and settle the problem. Please don't step into something that does not concern you.
Involve oneself or intervene, as in He knew he'd be able to step into a job in his father's firm, or Jane asked Mary to step into the matter and settle it. Also see step in.
To intervene in some matter: The arbitrator stepped into the dispute to resolve the differences between the union and management.