Learn Japanese with Anime - He Stole Something Outrageous… Your Heart

Analysis

奴はとんでもないものを盗んでいきました

奴 is used as the third person pronoun meaning “he” or “that guy”. It’s usually used to refer to someone you despise or look down upon.

The は particle indicates the topic of the sentence.

とんでもない means “outrageous” “extraordinary” or “unthinkable” which is used when something exceeds the limits of what is usual.

And it modifies the following noun もの meaning “thing” so とんでもないもの means “outrageous thing” or “something outrageous”.

The を particle indicates the direct object of the following verb.

盗んで is the te-form of 盗む meaning “to steal” and いきました is the past tense of いきます which is the polite form of いく meaning “to go”.

When いく or くる follows the te-form of the general action verb, it describes the movement after the action is done. いく describes the one going away from the speaker, and くる describes the one coming towards the speaker.

So in this case, 盗んでいく means Lupin steals AND goes away from the speaker. On the other hand, 盗んでくる means Lupin steals AND comes towards the speaker which would be Jigen or Goemon.

So 奴はとんでもないものを盗んでいきました means “He stole something outrageous (and left)”.

あなたの心です

あなた meaning “you” followed by the possessive particle の means “your” and it modifies the following noun 心 meaning “heart”.

です is used to affirm the statement in polite speech.

So he is saying that Lupin stole something outrageous which is her heart. とんでもない usually has a negative connotation just like the English word “outrageous” but in this case he used this word to say it’s very shocking and unacceptable as her heart is too precious to be stolen.