There is something you so deeply want to get to the bottom of .

（何か心の底から真相を知りたいと思っていることがらがおありですね。）
　Madalyn Aslanのホームページ内・Kristin Fontanaによる山羊座週報より。

• "get to the bottom of something"が成句で「〜の真相を知る（to discover the truth about a situation／to find out the cause of a problem or situation）」。「底にたどり着く」というイメージはわかりやすい。
  • The family finally got to the bottom of why their boy was killed.
  • How will investigators get to the bottom of the affair with so little evidence?
  • I never got to the bottom of this!
  • He hopes to get to the bottom of the scam.（scam=汚い手口、詐欺）