Bi Erotik 4 begins in a house overlooking a snow-covered valley, where we watch as a fit young man works out in the gym. His mate and girlfriend join him and, whilst she tries out the equipment, they suck and feel hers. The two guys soon have their cocks out and she greedily sucks on each one in turn. They undress her fully and lay on the floor where she sucks her boyfriend's cock whilst his mate rams it into her pussy. Before long, the boyfriend moves in behind his mate, lubes his throbbing member and fucks him up the ass whilst the mate is still fucking the girlfriend. The next scene finds us interrupting a guy shagging his girlfriend. His mate walks in with his hard cock bouncing in front of him. Needing no invitation, she grabs it and locks her lips round his shaft before he withdraws and moves it into his pals waiting mouth. There ensues a spectacular love train, until they make a sandwich and fuck the girls' pussy and tight, cute arsehole. She can't get enough as she grits her teeth then screams out loud. The final scene is another fantastic boy/girl/boy session; where these horny bis can't get enough ass, pussy and wet, warm mouths.