Tricksy Bird says a player must *reveal* the chosen plot. Beneath the Bridge of Dream says you *chose* a plot at random. Technically chosing (step 1.2) and revealing (step 1.3) are different steps, and as far as I can tell nothing forces me to reveal the plot that I have chosen! (i.e. nothing technically makes me unable to reveal Valar)
The Crow is a Tricksy Bird
Plot Action: Kneel your faction card to choose an opponent and look at his or her plot deck. Choose 1 plot in that deck. That player must reveal that plot as his or her next plot card, if able.
Beneath the Bridge of Dream
Interrupt: When you choose a plot card to reveal in the plot phase, instead shuffle your used pile into your plot deck and choose a plot card to reveal at random. Until the end of the round, increase the gold value on your revealed plot card by 2.