Close investigation revealed the fact that she had last been seen in Loki’s company, and when Odin sternly called him to account, he was forced to admit that he had betrayed her into the storm-giant’s power.
“By his mocking, scornful mien,
Soon in Valhal it was seen
’Twas the traitor Loki’s art
Which had led Idun apart
To gloomy tower
And Jotun power.”
Valhalla (J. C. Jones).
The Return of Idun
The attitude of the gods now became very menacing, and it was clear to Loki that if he did not devise means to restore the goddess, and that soon, his life would be in considerable danger.