 Set in the 22nd century , the series follows the adventures of the first Starfleet starship Enterprise , registration NX @-@ 01 . In this episode , Ensign Hoshi Sato ( Linda Park ) is contacted telepathically by an alien named Tarquin ( Maury Sterling ) , who offers assistance with the Xindi . Whilst she visits Tarquin at his home , the rest of the crew investigate another mysterious sphere within the expanse . 
