in too deep
Adjective
Meaning
in too deep (not comparable)
(idiomatic) Involved in a situation to the extent that one cannot cope.
Examples
Sometimes the only thing that got you through hell was that you were in too deep to pull out.
And Jarrell's close readings of poems like "Neither Out Too Far Nor In Too Deep" led readers and critics to perceive more of the complexities in Frost's poetry.