  Thanks to the precise astrometric measurements of proper motions by the Gaia
mission, a new tidal stellar stream has been discovered in the northern
hemisphere. The distribution of star count shows that the stream is
approximately $80$ degrees long and $1.70$ degrees wide. Observations of $21$
member stars, including 14 RR Lyrae stars, indicate that the stream has an
eccentric and retrograde orbit with $e=0.58$. The low metallicity, high total
energy, and large angular momentum suggest that it is associated with the
merging event Sequoia. This discovery suggests the possibility of finding more
substructures with high eccentricity orbits, even in the inner halo.
