While the effect of “Timidity” is active, all effects of a card which would destroy a Set Spell or Trap Card are negated.
While the effect of “Timidity” is active, you cannot destroy a face-down Monster Card equipped to “Relinquished”.
While the effect of “Timidity” is active, and your opponent activates “Heavy Storm”, face-down Spell and Trap Cards are not destroyed but face-up cards will be.
Netrep Rulings:
The effect of “Timidity” applies until the beginning of the opponent’s End Phase.